Find the words cited in papers that are cited by sima01computational?
paper cited by refers to citing_paper_id; citing_paper_id = 'sima01computational';
SELECT DISTINCT T2.word_cited_id FROM cites AS T1 INNER JOIN content AS T2 ON T1.cited_paper_id = T2.paper_id WHERE T1.citing_paper_id = 'sima01computational'