Table: fighter_record_15
Columns: res
record
opponent
method
event
round
time
location

Question: What method was used in the match that went to round 1, and had a 6-3-1 record?
SQL: SELECT "method" FROM fighter_record_15 WHERE "round" = 1 AND "record" = '6-3-1'

Question: In the match against Marcus Aurélio with a method of decision (unanimous), what was the results?
SQL: SELECT "res" FROM fighter_record_15 WHERE "method" = 'decision (unanimous)' AND "opponent" = 'marcus aurélio'

Question: Where was the Deep - 30 Impact event held?
SQL: SELECT "location" FROM fighter_record_15 WHERE "event" = 'deep - 30 impact'