Table: fighter_results_8
Columns: res
record
opponent
method
event
round
time
location

Question: Who was the opponent when he went more than 1 round with a record of 12-7?
SQL: SELECT "opponent" FROM fighter_results_8 WHERE "round" > 1 AND "record" = '12-7'

Question: Which event did he win with a method of submission (triangle choke) and a time of n/a?
SQL: SELECT "event" FROM fighter_results_8 WHERE "res" = 'win' AND "time" = 'n/a' AND "method" = 'submission (triangle choke)'

Question: What was the result when the method was submission (kimura)?
SQL: SELECT "res" FROM fighter_results_8 WHERE "method" = 'submission (kimura)'

Question: In which location was the method decision (split)?
SQL: SELECT "location" FROM fighter_results_8 WHERE "method" = 'decision (split)'

Question: In which location did the fight last just 0:31?
SQL: SELECT "location" FROM fighter_results_8 WHERE "time" = '0:31'