Task: Question Generation
Input (English): London is also home to sizeable Muslim, Hindu, Sikh, and Jewish communities. Notable mosques include the East London Mosque in Tower Hamlets, London Central Mosque on the edge of Regent's Park and the Baitul Futuh Mosque of the Ahmadiyya Muslim Community. Following the oil boom, increasing numbers of wealthy Hindus and Middle-Eastern Muslims have based themselves around Mayfair and Knightsbridge in West London. There are large Muslim communities in the eastern boroughs of Tower Hamlets and Newham. Large Hindu communities are in the north-western boroughs of Harrow and Brent, the latter of which is home to Europe's largest Hindu temple, Neasden Temple. London is also home to 42 Hindu temples. There are Sikh communities in East and West London, particularly in Southall, home to one of the largest Sikh populations and the largest Sikh temple outside India.
Output (English): How many Hindu temples exist in London?