Provide the number of events attended by Luisa Guidi. What is her major?
major refers to major_name;
SELECT COUNT(T3.link_to_event), T1.major_name FROM major AS T1 INNER JOIN member AS T2 ON T1.major_id = T2.link_to_major INNER JOIN attendance AS T3 ON T2.member_id = T3.link_to_member WHERE T2.first_name = 'Luisa' AND T2.last_name = 'Guidi'