In my opinion, Don Quixote was conducting an experiment.
1	In	in	ADP	_	_	3	case	_	_
2	my	I	PRON	P1SG-GEN	Number=Sing|Person=1|Poss=Yes|PronType=Prs	3	nmod:poss	_	_
3	opinion	opinion	NOUN	SG-NOM	Number=Sing	8	obl	_	SpaceAfter=No
4	,	,	PUNCT	Comma	_	3	punct	_	_
5	Don	Don	PROPN	SG-NOM	Number=Sing	8	nsubj	_	_
6	Quixote	Quixote	PROPN	SG-NOM	Number=Sing	5	flat	_	_
7	was	be	AUX	PAST	Mood=Ind|Number=Sing|Person=1|Tense=Past|VerbForm=Fin	8	aux	_	_
8	conducting	conduct	VERB	ING	Tense=Pres|VerbForm=Part	0	root	_	_
9	an	an	DET	IND-SG	Definite=Ind|PronType=Art	10	det	_	_
10	experiment	experiment	NOUN	SG-NOM	Number=Sing	8	obj	_	SpaceAfter=No
11	.	.	PUNCT	Period	_	8	punct	_	_
