Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
--------
Question: The 2002 Winter Olympics were held in which city?

Answer: 2002 winter olympics


Question: Richard Block and David Quayle founded which British-based DIY retailing company in 1969?

Answer: david quayle


Question: In 1864, the Dale Dyke Dam burst while being filled, leading to the death of 240 people in which British city?

Answer:
dale dike reservoir