Given the task definition and input, reply with output. 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.

Context: 1784 Benguella, provisional designation 1935 MG, is an asteroid from the asteroid belt discovered by English-born South African astronomer Cyril Jackson at Union Observatory, Johannesburg on 30 June 1935.
Question: At which time was 1784 Benguella discovered?
30 june 1935