Q: Information:  - Intertidal ecology is the study of intertidal ecosystems, where organisms live between the low and high tide lines. At low tide, the intertidal is exposed whereas at high tide, the intertidal is underwater. Intertidal ecologists therefore study the interactions between intertidal organisms and their environment, as well as between different species of intertidal organisms within a particular intertidal community. The most important environmental and species interactions may vary based on the type of intertidal community being studied, the broadest of classifications being based on substrates - rocky shore and soft bottom communities.  - A rocky shore is an intertidal area of seacoasts where solid rock predominates. Rocky shores are biologically rich environments, and are a useful "natural laboratory" for studying intertidal ecology and other biological processes. Due to their high accessibility, they have been well studied for a long time and their species are well known.  - Chalk is a soft, white, porous, sedimentary carbonate rock, a form of limestone composed of the mineral calcite. Calcite is an ionic salt called calcium carbonate or CaCO. It forms under reasonably deep marine conditions from the gradual accumulation of minute calcite shells (coccoliths) shed from micro-organisms called coccolithophores. Flint (a type of chert unique to chalk) is very common as bands parallel to the bedding or as nodules embedded in chalk. It is probably derived from sponge spicules or other siliceous organisms as water is expelled upwards during compaction. Flint is often deposited around larger fossils such as Echinoidea which may be silicified (i.e. replaced molecule by molecule by flint).  - Calcareous is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines.  - Corallina officinalis is a calcareous red seaweed which grows in the lower and mid-littoral zones on rocky shores . It is primarily found growing around the rims of tide pools , but can be found in shallow crevices anywhere on the rocky shore that are regularly refreshed with sea water . It predominantly grows on the lower shore , especially where fucoid algae are absent , but is also found further up shore on exposed coasts . It forms calcium carbonate deposits within its cells which serve to strengthen the thallus . These white deposits cause the seaweed to appear pink in colour , with white patches where the calcium carbonate is particularly concentrated , such as at the growing tips . The calcium carbonate makes it unpalatable to most rocky shore grazers .    Given the information above, choose from the list below the object entity that exhibits the relation 'taxon rank' with the subject 'corallina officinalis'.  Choices: - form  - species  - variety
A: species


Q: Information:  - Thescelosauridae is a clade or family of small ornithischians which have previously been generally allied to hypsilophodontids .  - Hypsilophodonts (named after "Hypsilophodon", itself derived from the "Hypsilophus" ("high-crested") genus of iguana lizard and literally meaning ""Hypsilophus"-tooth") were small ornithopod dinosaurs, regarded as fast, herbivorous bipeds on the order of 12 meters long (3.36.6 feet). They are known from Asia, Australia, Europe, New Zealand, North America, and South America, from rocks of Middle Jurassic to late Cretaceous age. The group traditionally has included almost all bipedal bird-hipped dinosaurs other than iguanodonts, and some early phylogenetic analyses found it to be a natural group, but more recent studies have found that the group is mostly paraphyletic and the taxa within represent a series leading up to Iguanodontia. Some of these studies have moved some traditional hypsilophodonts out of the Ornithopoda, such as "Agilisaurus" and "Othnielosaurus" (="Othnielia"). Thus, the only certain member at this time is "Hypsilophodon".  - A clade (from , "klados", "branch") is a group of organisms that consists of a common ancestor and all its lineal descendants, and represents a single "branch" on the "tree of life".  - Ants are eusocial insects of the family Formicidae and, along with the related wasps and bees, belong to the order Hymenoptera. Ants evolved from wasp-like ancestors in the Cretaceous period, about 99 million years ago and diversified after the rise of flowering plants. More than 12,500 of an estimated total of 22,000 species have been classified. They are easily identified by their elbowed antennae and the distinctive node-like structure that forms their slender waists.  - In biology, an organism is any contiguous living system, such as an animal, plant, fungus, archaeon, or bacterium. All known types of organisms are capable of some degree of response to stimuli, reproduction, growth and development and homeostasis. An organism consists of one or more cells; when it has one cell it is known as a unicellular organism; and when it has more than one it is known as a multicellular organism. Most unicellular organisms are of microscopic scale and are thus loosely described as microorganisms. Humans are multicellular organisms composed of many trillions of cells grouped into specialized tissues and organs.    Given the information above, choose from the list below the object entity that exhibits the relation 'parent taxon' with the subject 'thescelosauridae'.  Choices: - animal  - insects  - ornithopod  - plant
A: ornithopod