About handling Null values in calculations
1	About	about	ADP	_	_	2	mark	_	_
2	handling	handle	VERB	ING	Tense=Pres|VerbForm=Part	0	root	_	_
3	Null	null	NOUN	SG-NOM	Number=Sing	4	compound	_	_
4	values	value	NOUN	PL-NOM	Number=Plur	2	obj	_	_
5	in	in	ADP	_	_	6	case	_	_
6	calculations	calculation	NOUN	PL-NOM	Number=Plur	4	nmod	_	_
