Conversation so far:
What was The Sweet's first album?
Funny How Sweet Co-Co Can Be is the Sweet's first album.
Did The Sweet's album Funny How Sweet Co-Co Can Be do well?
The Sweet's album Funny How Sweet Co-Co Can Be was not a serious contender on the charts.
What was special about The Sweet's first album
Did The Sweet tour?
The Sweet toured in the US and Japan.
Did any of The Sweet's songs chart?
They achieved success in the UK charts, with thirteen Top 20 hits during the 1970s alone, with Block Buster! topping the chart, followed by three consecutive number two hits.
Did The Sweet win any awards?
Are there any other interesting aspects about The Sweet?
The Sweet's Funny How Sweet Co-Co Can Be albums failure to match the success of their singles was a problem that would plague the band throughout their career.

Question: when was this deal signed?
Self-contained rewrite: When was this deal signed?