How many research assistants does Sauveur Skyme have?
research assistant refers to the student who serves for research where the abbreviation is RA;
SELECT COUNT(T1.student_id) FROM RA AS T1 INNER JOIN prof AS T2 ON T1.prof_id = T2.prof_id WHERE T2.first_name = 'Sauveur' AND T2.last_name = 'Skyme'