Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

In March 1992 'Deeply Dippy' was the only number one hit for which group?
deeply dippy

In 1981, in a move that met with considerable controversy, the Agriculture Department in the US proposed classifying pickle relish and what other condiment as vegetables in order to save money on school lunch programs?
condiment

Which composer wrote the 1944 oratorio A Child of our Time?
a child of our time