Database: books
Question: Among the books ordered by Lucas Wyldbore, how many of them are over 300 pages?
SQL: SELECT COUNT(*) FROM book AS T1 INNER JOIN order_line AS T2 ON T1.book_id = T2.book_id INNER JOIN cust_order AS T3 ON T3.order_id = T2.order_id INNER JOIN customer AS T4 ON T4.customer_id = T3.customer_id WHERE T4.first_name = 'Lucas' AND T4.last_name = 'Wyldbore' AND T1.num_pages > 300