Table: neuza_silva_2002_fed
Columns: edition
round
date
against
surface
opponent
result

Question: what is the surface when the opponent is selma babic?
SQL: SELECT "surface" FROM neuza_silva_2002_fed WHERE "opponent" = 'selma babic'

Question: what is the surface when the round is gii play-offs and the edition is 2009 fed cup europe/africa group ii?
SQL: SELECT "surface" FROM neuza_silva_2002_fed WHERE "round" = 'gii play-offs' AND "edition" = '2009 fed cup europe/africa group ii'

Question: what is the date when the surface is clay and the result is 6–7 (4–7) , 1–6?
SQL: SELECT "date" FROM neuza_silva_2002_fed WHERE "surface" = 'clay' AND "result" = '6–7 (4–7) , 1–6'

Question: who is the opponent when norway is against?
SQL: SELECT "opponent" FROM neuza_silva_2002_fed WHERE "against" = 'norway'