How many paragraphs are there in the longest chapter where Sir Richard Ratcliff appeared?
longest chapter refers to max(ParagraphNum); Sir Richard Ratcliff  refers to CharName = 'Sir Richard Ratcliff'
SELECT MAX(T2.ParagraphNum) FROM characters AS T1 INNER JOIN paragraphs AS T2 ON T1.id = T2.character_id WHERE T1.CharName = 'Sir Richard Ratcliff'