input: Please answer the following: Extract the answer to the question from the following context. Question: Which of the following is not a type of ground: clays, sands or water? Context: Underpinning Houston's land surface are unconsolidated clays, clay shales, and poorly cemented sands up to several miles deep. The region's geology developed from river deposits formed from the erosion of the Rocky Mountains. These sediments consist of a series of sands and clays deposited on decaying organic marine matter, that over time, transformed into oil and natural gas. Beneath the layers of sediment is a water-deposited layer of halite, a rock salt. The porous layers were compressed over time and forced upward. As it pushed upward, the salt dragged surrounding sediments into salt dome formations, often trapping oil and gas that seeped from the surrounding porous sands. The thick, rich, sometimes black, surface soil is suitable for rice farming in suburban outskirts where the city continues to grow.
++++++++++
output: water


input: Please answer the following: Extract the answer to the question from the following context. Question: How do we know when to date the term Iran? Context: The term Iran derives directly from Middle Persian Ērān, first attested in a 3rd-century inscription at Rustam Relief, with the accompanying Parthian inscription using the term Aryān, in reference to Iranians. The Middle Iranian ērān and aryān are oblique plural forms of gentilic ēr- (Middle Persian) and ary- (Parthian), both deriving from Proto-Iranian *arya- (meaning "Aryan," i.e., "of the Iranians"), argued to descend from Proto-Indo-European *ar-yo-, meaning "skillful assembler." In Iranian languages, the gentilic is attested as a self-identifier included in ancient inscriptions and the literature of Avesta,[a] and remains also in other Iranian ethnic names such as Alans (Ossetic: Ир – Ir) and Iron (Ossetic: Ирон – Iron).
++++++++++
output: inscription at Rustam Relief


input: Please answer the following: Extract the answer to the question from the following context. Question: Apple's iPhone 4 was released in what year? Context: In April 2008, a £90m contract was signed with Boeing for a "quick fix" solution, so they can fly by 2010: QinetiQ will downgrade the Chinooks—stripping out some of their more advanced equipment.
++++++++++
output: 2010


input: Please answer the following: Extract the answer to the question from the following context. Question: A NBA team that gets their namesake from the US space program is called? Context: In the aftermath of Hurricane Katrina, the NBA's New Orleans Hornets (now the New Orleans Pelicans) temporarily relocated to the Ford Center, playing the majority of its home games there during the 2005–06 and 2006–07 seasons. The team became the first NBA franchise to play regular-season games in the state of Oklahoma.[citation needed] The team was known as the New Orleans/Oklahoma City Hornets while playing in Oklahoma City. The team ultimately returned to New Orleans full-time for the 2007–08 season. The Hornets played their final home game in Oklahoma City during the exhibition season on October 9, 2007 against the Houston Rockets.
++++++++++
output:
Houston Rockets