Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Input: Consider Input: Context: Feia Lacus is one of a number of hydrocarbon seas and lakes found on Saturn's largest moon, Titan. 
 Question: What celestial body can Feia Lacus be found on?

Output: titan


Input: Consider Input: Context: The Nicobar parakeet is classified as near-threatened by the IUCN. 
 Question: What is the endangered status of Nicobar parakeet?

Output: near-threatened


Input: Consider Input: Context: In a phase I study, Gilead Sciences' PI3K- inhibitor idelalisib produced rapid tumor shrinkage-a response that lasted for 17 months on average-in about half of the 54 patients with chronic lymphocytic leukemia who participated. 
 Question: What is the target protein of the drug Idelalisib?


Output: phosphoinositol-3 kinase delta isoform