CREATE TABLE songs (songid NUMBER, title CLOB)
CREATE TABLE vocals (songid NUMBER, bandmate NUMBER, type CLOB)
CREATE TABLE performance (songid NUMBER, bandmate NUMBER, stageposition CLOB)
CREATE TABLE albums (aid NUMBER, title CLOB, year NUMBER, label CLOB, type CLOB)
CREATE TABLE band (id NUMBER, firstname CLOB, lastname CLOB)
CREATE TABLE instruments (songid NUMBER, bandmateid NUMBER, instrument CLOB)
CREATE TABLE tracklists (albumid NUMBER, position NUMBER, songid NUMBER)

Find all the instruments ever used by the musician with last name 'Heilo'?
SELECT instrument FROM instruments AS T1 JOIN band AS T2 ON T1.bandmateid = T2.id WHERE T2.lastname = "Heilo"
SELECT "instrument" FROM "instruments" "T1" JOIN "band" "T2" ON "Heilo" = "T2"."lastname" AND "T1"."bandmateid" = "T2"."id"