Write SQL query to solve given problem: How many papers were cited by schmidt99advanced cited word3555?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T2.paper_id) FROM cites AS T1 INNER JOIN content AS T2 ON T1.cited_paper_id = T2.paper_id WHERE T1.citing_paper_id = 'schmidt99advanced' AND T2.word_cited_id = 'word3555'