Table: blues_season
Columns: date
visitor
score
home
decision
attendance
series

Question: What was the series score when st. louis was away on april 18?
SQL: SELECT "series" FROM blues_season WHERE "visitor" = 'st. louis' AND "date" = 'april 18'

Question: Who recorded the decision when philadelphia was away?
SQL: SELECT "decision" FROM blues_season WHERE "visitor" = 'philadelphia'