7 and 8.
Chopin, _Mazurkas_, Nos.

6, 12, 23, 47, 50.

In Nos.

10, 45, 46 and 51, the subordinate song consists of one Part only, but is sufficiently distinct, complete, and separate to leave no doubt of the form.
Also Chopin, _Nocturne_ No.

13 (op.