I want to know the answer to the following question:
Besides the Arsenal, Chelsea, and Tottenham football clubs, how many London-based football club have won a national league titie?
All the background I'm provided with is that "London's most popular sport is football and it has fourteen League football clubs, including five in the Premier League: Arsenal, Chelsea, Crystal Palace, Tottenham Hotspur, and West Ham United.". Is that enough to answer the question?
Answer: no