Table: svetoslav_todorov_match_stats
Columns: date
venue
score
result
competition

Question: What score does Vasil Levski National Stadium, Sofia earn?
SQL: SELECT "score" FROM svetoslav_todorov_match_stats WHERE "venue" = 'vasil levski national stadium, sofia'

Question: What score did vasil levski national stadium, sofia, which was friendly during competition, earn?
SQL: SELECT "score" FROM svetoslav_todorov_match_stats WHERE "competition" = 'friendly' AND "venue" = 'vasil levski national stadium, sofia'