user: Question: Name the circuit for gt3 Alex Mortimer Bradley Ellis
Columns: ['Round', 'Circuit', 'Date', 'Length', 'Pole Position', 'GT3 Winner', 'GT4 Winner']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Oulton Park', '22 March', '60 mins', 'No. 14 CR Scuderia', 'No. 15 CR Scuderia', 'No. 51 Team RPM']
SQL:

assistant: SELECT "Circuit" FROM "Table" WHERE "GT3 Winner" = 'Alex Mortimer Bradley Ellis';