Conversation so far:
How did Agnetha Fältskog's career begin in 1966?
Faltskog worked as a telephonist for a car firm while performing with a local dance band, headed by Bernt Enghardt.
Did she start with the band in 1966?
CANNOTANSWER.
What is a major event that occurred sometime between 1966-1971?
Her self-penned debut single "Jag var sa kar" was released through Cupol Records in 1967.

Question: Did the song perform well?
Self-contained rewrite: Did Agnetha Fältskog's song "Jag var sa kar" perform well?