Table: celtics_seasons
Columns: season
conf
conf_finish
div
div_finish
head_coach

Question: What was the division when Jim O'Brien was the head coach and the team finished 2nd in the division?
SQL: SELECT "div" FROM celtics_seasons WHERE "div_finish" = '2nd' AND "head_coach" = 'jim o''brien'

Question: What is the name of the conference that K. C. Jones was a head coach in?
SQL: SELECT "conf" FROM celtics_seasons WHERE "head_coach" = 'k. c. jones'