Table: spacewalks
Columns: col
spacecraft
spacewalkers
start_utc
end_utc
duration

Question: What is the end (UTC) for spacecraft STS-114 Eva 3?
SQL: SELECT "end_utc" FROM spacewalks WHERE "spacecraft" = 'STS-114 EVA 3'

Question: What is the start date and time of the walk that ends March 28, 2005, 11:31?
SQL: SELECT "start_utc" FROM spacewalks WHERE "end_utc" = 'March 28, 2005, 11:31'