Write introductions on the following music pieces. 1.J.S. Bach's Partita No.6 in E minor "Toccata 2.Dieterich Buxtehude's Befiehl dem Engel BUXWV 10 3.William Byrd's Fantasia in C 4.Dieterich Buxtehude's Jesu, meine Freude, BUXWV 60 5.Tarquinio Merula's Hor ch'e tempo di dormire 6.J.S Bach's Gottes Zeit is die allerbeste Zeit
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