The man who followed could only be his father.
1	The	the	DET	DEF	Definite=Def|PronType=Art	2	det	_	_
2	man	man	NOUN	SG-NOM	Number=Sing	9	nsubj	_	_
3	who	who	PRON	WH-REL	PronType=Rel	4	nsubj	_	_
4	followed	follow	VERB	PAST	Mood=Ind|Tense=Past|VerbForm=Fin	2	acl:relcl	_	_
5	could	could	AUX	PAST-AUX	VerbForm=Fin	9	aux	_	_
6	only	only	ADV	_	_	9	advmod	_	_
7	be	be	AUX	INF	VerbForm=Inf	9	cop	_	_
8	his	he	PRON	P3SG-GEN	Gender=Masc|Number=Sing|Person=3|Poss=Yes|PronType=Prs	9	nmod:poss	_	_
9	father	father	NOUN	SG-NOM	Number=Sing	0	root	_	SpaceAfter=No
10	.	.	PUNCT	Period	_	9	punct	_	_
