In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.

Which muslim leader received the title of knighthood in 1888?
Sir Syed Ahmed Taqvi bin Syed Muhammad Muttaqi

Where do purple martins go for the winter?
Amazon River Basin

Who is narrating the vietnam documentary on pbs?

Peter Coyote