Which vocal type has the band mate with first name "Marianne" played?
select type from vocals as t1 join band as t2 on t1.bandmate = t2.id where firstname = "Marianne" group by type
Which one did she play the most?
select type from vocals as t1 join band as t2 on t1.bandmate = t2.id where firstname = "Marianne" group by type order by count(*) desc limit 1