Write SQL query to solve given problem: Among the trips in August 2013, how many bikes were borrowed from Redwood City.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T2.start_date) FROM station AS T1 INNER JOIN trip AS T2 ON T2.start_station_name = T1.name WHERE T2.start_date LIKE '8/%/2013%' AND T1.city = 'Redwood City'