Did a group of scientists organise an Investigation Bureau in the 1960s?-общий вопрос
Did a group of scientists or students organise an Investigation Bureau in the 1960s?-альтернативный вопрос
Who organised an Investigation Bureu in the 1960s?-вопрос к подлежащему
What did a group of scientists organise in the 1960?-специальный вопрос
A group of scientists organised an Investigation Bureau in the 1960s,didn't it?-разделительный вопрос