user: Question: How many trains call at Castor, Overton, Peterborough East and are operated by LNWR?
Columns: ['Departure', 'Going to', 'Calling at', 'Arrival', 'Operator']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['03.54', 'Peterborough East', 'Peterborough East', '04.05', 'LNWR']
SQL:

assistant: SELECT COUNT("Arrival") FROM "Table" WHERE "Operator" = 'LNWR' AND "Calling at" = 'Castor, Overton, Peterborough East';