Q: In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
Passage: Defeating the aliens, Thor shares a double life with his alter ego: treating the ill in a private practice with nurse and eventual love Jane Foster, and defending humanity from evil. Thor's presence on Earth almost immediately attracts the attention of his adoptive brother and enemy Loki. Loki is responsible for the emergence of three of Thor's principal foes: the Absorbing Man; the Destroyer, and the Wrecker. On one occasion, Loki's tactics were accidentally beneficial although successful in using an illusion of the Hulk to draw Thor into battle, it results in the formation of the superhero team the Avengers, of which Thor is a founding and longstanding member. Thor's other early foes include Zarrko, the Tomorrow Man; the Radioactive Man; the Lava Man; the Cobra; Mister Hyde; the Enchantress and the Executioner, and the Grey Gargoyle.
Link Information: none Answer: none
A:
Who was Thor's alter ego?