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.
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Question: Context: 35 Leukothea (/ljuki/ lew-KOTH-ee-, Greek: ) is a large, dark asteroid from the asteroid belt It was discovered by German astronomer Karl Theodor Robert Luther on April 19, 1855, and named after Leukothea, a sea goddess in Greek mythology. 
 Question: Who discovered the 35 Leukothea?

Answer: robert luther


Question: Context: Gerard Debreu (French: (db); 4 July 1921 -- 31 December 2004) was a French-born American economist and mathematician. 
 Question: What is the birth date of Gerard Debreu?

Answer: 4 july 1921


Question: Context: Helikopter Service Flight 165 was a crash of a Sikorsky S-61 helicopter into the North Sea, 78 nautical miles (144 km; 90 mi) northeast of Bergen, Norway, on 26 June 1978. 
 Question: What is the date when Helikopter Service Flight 165 happened?

Answer:
26 june 1978