Conversation so far:
What is Silence is Easy?
their second album.
What songs were on the album?
"Silence Is Easy", and "White Dove".
Were there any other songs?
"Shark Food.
Was the album a success?
The album charted well, but sales were sluggish in comparison to the band's first album.

Question: Which songs were successful?
Self-contained rewrite: Which songs were successful in  Silence Is Easy?