user: Question: What is the year of entry for the University of Essex?
Columns: ['Team', 'University', 'Location', 'Year entered league', '2013–14 division']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['ARU Rhinos', 'Anglia Ruskin University', 'Cambridge', 2012.0, 'South Eastern A']
SQL:

assistant: SELECT "Year entered league" FROM "Table" WHERE "University" = 'University of Essex';