Try obedience classes.
1	Try	try	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	0:root	_
2	obedience	obedience	NOUN	NN	Number=Sing	3	compound	3:compound	_
3	classes	class	NOUN	NNS	Number=Plur	1	obj	1:obj	SpaceAfter=No
4	.	.	PUNCT	.	_	1	punct	1:punct	_
