Table: fa_cup_matches_44
Columns: tie_no
home_team
score
away_team
date

Question: What was the tie number for the round against visiting opponent Chelsea?
SQL: SELECT SUM("tie_no") FROM fa_cup_matches_44 WHERE "away_team" = 'chelsea'

Question: What was the tie number for the round against visiting opponent Newcastle United?
SQL: SELECT "tie_no" FROM fa_cup_matches_44 WHERE "away_team" = 'newcastle united'