They must have read these reviews and improved!
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	4	nsubj	4:nsubj|8:nsubj	_
2	must	must	AUX	MD	VerbForm=Fin	4	aux	4:aux	_
3	have	have	AUX	VB	VerbForm=Inf	4	aux	4:aux	_
4	read	read	VERB	VBN	Tense=Past|VerbForm=Part	0	root	0:root	_
5	these	this	DET	DT	Number=Plur|PronType=Dem	6	det	6:det	_
6	reviews	review	NOUN	NNS	Number=Plur	4	obj	4:obj	_
7	and	and	CCONJ	CC	_	8	cc	8:cc	_
8	improved	improve	VERB	VBN	Tense=Past|VerbForm=Part	4	conj	4:conj:and	SpaceAfter=No
9	!	!	PUNCT	.	_	4	punct	4:punct	_
