user: Question: What is the number of registered mosques with a population of England and Wales greater than 46196 in a year before 1971?
Columns: ['Census Year', "Number of Muslims '000", "Population of England and Wales '000", 'Muslim (% of Total population)', 'Registered Mosques', 'Muslims per mosque']
Types: ['real', 'real', 'real', 'real', 'real', 'real']
Sample row: [1961.0, 50.0, 46196.0, 0.11, 7.0, 7143.0]
SQL:

assistant: SELECT COUNT("Registered Mosques") FROM "Table" WHERE "Population of England and Wales '000" > 46196.0 AND "Census Year" < 1971.0;