Question: Which travel and tourism website's user activity has indicated that London is the number one travel destination?
Sentence: It is also the top city in the world by visitor cross-border spending, estimated at US$20.23 billion in 2015 Tourism is one of London's prime industries, employing the equivalent of 350,000 full-time workers in 2003, and the city accounts for 54% of all inbound visitor spend in UK.
Answer in sentence: no