Table:
text: 1970 NBA draft
Draft
Draft
Round Pick Player Pos_ Nationality Team School_club_team
1 7 John Johnson Category:Articles with hCards + F United States Cleveland Cavaliers Iowa
1 8 Geoff Petrie Category:Articles with hCards + G United States Portland Trail Blazers Princeton
1 9 George E. Johnson Category:Articles with hCards C United States Baltimore Bullets (from Buffalo ) [b ] Stephen F. Austin
1 10 Greg Howard Category:Articles with hCards F/C United States Phoenix Suns Brill Cagliari ( Italy )
1 11 Jimmy Collins Category:Articles with hCards G United States Chicago Bulls New Mexico State
1 12 Al Henry Category:Articles with hCards C United States Philadelphia 76ers Wisconsin
1 13 Jim McMillian Category:Articles with hCards F United States Los Angeles Lakers Columbia

Question: How many rounds have a pick of 13 in the 1970 NBA draft?