Which professor advised Willie Rechert to work as a research assistant? Please give his or her full name.
research assistant refers to the student who serves for research where the abbreviation is RA; prof_id refers to professor’s ID; full name refers to f_name and l_name;
SELECT T1.first_name, T1.last_name FROM prof AS T1 INNER JOIN RA AS T2 ON T1.prof_id = T2.prof_id INNER JOIN student AS T3 ON T2.student_id = T3.student_id WHERE T3.f_name = 'Willie' AND T3.l_name = 'Rechert'