These works suffered from a lack of firsthand knowledge;
1	These	this	DET	DD	Number=Plur|PronType=Dem	2	det	_	_
2	works	work	NOUN	S	Number=Plur	3	nsubj	_	_
3	suffered	suffer	VERB	V	Mood=Ind|Person=3|Tense=Past|VerbForm=Fin	0	root	_	_
4	from	from	ADP	E	_	6	case	_	_
5	a	a	DET	RI	Definite=Ind|Number=Sing|PronType=Art	6	det	_	_
6	lack	lack	NOUN	S	Number=Sing	3	obl	_	_
7	of	of	ADP	E	_	9	case	_	_
8	firsthand	firsthand	ADJ	A	Degree=Pos	9	amod	_	_
9	knowledge	knowledge	NOUN	S	Number=Sing	6	nmod	_	SpaceAfter=No
10	;	;	PUNCT	FC	_	3	punct	_	_
