Table:
text: Seattle SuperSonics all-time roster
B
B
Player Nationality Jersey_Numbers Position_ Years
Butch Beard Category:Articles with hCards United States 21 SG 1972–1973
Benoit Benjamin Category:Articles with hCards United States 00 C 1990 – 1993
Tom Black Category:Articles with hCards United States 12 C 1970–1971
Cory Blackwell Category:Articles with hCards United States 30 SF 1984–1985
Calvin Booth Category:Articles with hCards United States 52 C 2001 – 2004
Bob Boozer Category:Articles with hCards United States 20 PF 1969–1970
Lazaro Borrell Category:Articles with hCards Cuba 11 PF 1999–2000
Charles Bradley Category:Articles with hCards United States 30 SG 1983
Frank Brickowski Category:Articles with hCards United States 33, 34 PF / C 1984 – 1986 1995–1996

text: Seattle SuperSonics all-time roster
B
B
Player Nationality Jersey_Numbers Position_ Years
James Bailey Category:Articles with hCards United States 20 PF / Center 1979 – 1981
Vin Baker Category:Articles with hCards United States 42 PF 1997 – 2002
Greg Ballard Category:Articles with hCards United States 42 PF 1988–1989
Mike Bantom Category:Articles with hCards United States 40 PF / C 1975 – 1977
Norton Barnhill Category:Articles with hCards United States 10 G 1976–1977
Dana Barros Category:Articles with hCards United States 3, 11 PG 1989 – 1993
Brent Barry Category:Articles with hCards United States 31 SG 1999 – 2004
Drew Barry Category:Articles with hCards United States 12 SG 1999

text: Seattle SuperSonics all-time roster
B
B
Player Nationality Jersey_Numbers Position_ Years
John Brisker Category:Articles with hCards United States 40, 42 SF - SG 1972 – 1975
^ Fred Brown Category:Articles with hCards United States 32 PG / SG 1971 – 1984
Tony Brown Category:Articles with hCards United States 21 SF - SG 1992
Rick Brunson Category:Articles with hCards United States 5 PG 2005–2006
Tommy Burleson Category:Articles with hCards United States 16 C 1974 – 1977

Question: What is the year if the jersey number(s) is 21 and when the position is SG on the Seattle Supersonics all-time B roster?

Question: from the Seattle Supersonics All-Time B Roster, what is position if the nationality is United States, if the jersey number(s) is 12 and if the player is Tom Black Category: Articles with Hcards ?