Table: primera_division_apertura_2008
Columns: attendance
round
date
home
score
away
venue
weekday
time_of_day

Question: In what round was the Alianza home game?
SQL: SELECT "round" FROM primera_division_apertura_2008 WHERE "home" = 'alianza'

Question: What was the visiting team that played a round 16 game?
SQL: SELECT "away" FROM primera_division_apertura_2008 WHERE "round" = 'round 16'