In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Example input: Passage: Nearing London, Oliver encounters Jack Dawkins, a pickpocket more commonly known by the nickname the "Artful Dodger", and his sidekick, a boy of a humorous nature named Charley Bates, but Oliver's innocent and trusting nature fails to see any dishonesty in their actions. The Dodger provides Oliver with a free meal and tells him of a gentleman in London who will "give him lodgings for nothing, and never ask for change". Grateful for the unexpected assistance, Oliver follows the Dodger to the "old gentleman's" residence. In this way Oliver unwittingly falls in with an infamous Jewish criminal known as Fagin, the gentleman of whom the Artful Dodger spoke. Ensnared, Oliver lives with Fagin and his gang of juvenile pickpockets in their lair at Saffron Hill for some time, unaware of their criminal occupations. He believes they make wallets and handkerchiefs.
Example output: Who believes Fagin's gang make wallets and handkerchiefs?.
Example explanation: This question is based on the following sentence in the passage "He believes they make wallets and handkerchiefs". It evaluates the understanding that the pronoun "he" refers to name "Oliver". You can ask questions like this one about most pronouns in a paragraph.
Q: Passage: As the musical prelude climaxes, Woglinde and Wellgunde are seen at play in the depths of the Rhine. Flosshilde joins them after a gentle reminder of their responsibilities as guardians of the gold. They are observed by the Nibelung dwarf Alberich who calls out to them: "I'd like to draw near if you would be kind to me". The wary Flosshilde cries: "Guard the gold! Father warned us of such a foe". When Alberich begins his rough wooing the maidens relax: "Now I laugh at my fears, our enemy is in love", says Flosshilde, and a cruel teasing game ensues. First, Woglinde pretends to respond to the dwarf's advances but swims away as he tries to embrace her. Then Wellgunde takes over, and Alberich's hopes rise until her sharp retort: "Ugh, you hairy hunchbacked clown!" Flosshilde pretends to chastise her sisters for their cruelty and feigns her own courtship, by which Alberich is quite taken in until she suddenly tears away to join the others in a mocking song. Tormented with lust, Alberich furiously chases the maidens over the rocks, slipping and sliding as they elude him, before he sinks down in impotent rage. At this point the mood changes: as a sudden brightness penetrates the depths, a magical golden light reveals, for the first time, the Rhinegold on its rock. The maidens sing their ecstatic greeting to the gold, which rouses Alberich's curiosity. In response to his question Woglinde and Wellgunde reveal the gold's secret: measureless power would belong to the one who could forge a ring from it. Flosshilde scolds them for giving this secret away, but her concerns are dismissed—only someone who has forsworn love can obtain the gold, and Alberich is clearly so besotted as to present no danger. But their confidence is misplaced; in his humiliation Alberich decides that world mastery is more desirable than love. As the maidens continue to jeer his antics he scrambles up the rock and, uttering a curse on love, seizes the gold and disappears, leaving the Rhinemaidens to dive after him  bewailing their loss.
A:
What are the names of the three people who are observed by the Nibelung dwarf Alberich?