CREATE TABLE table_17337 ("Game" FLOAT, "Date" TEXT, "Team" TEXT, "Score" TEXT, "High points" TEXT, "High rebounds" TEXT, "High assists" TEXT, "Location Attendance" TEXT, "Record" TEXT)

Who had the high assists when the high rebounds were from Nick Collison (15)?
SELECT "High assists" FROM table_17337 WHERE "High rebounds" = 'Nick Collison (15)'
SELECT "High assists" FROM "table_17337" WHERE "High rebounds" = 'Nick Collison (15)'