Can we draw the following hypothesis from the context?

Context:

Some Enchanted Evening is the second live album by the American hard rock band Blue Oyster Cult, released in September 1978 (see 1978 in music). It is Blue Oyster Cult's best selling album, having sold two million copies, including over a million in the United States. The album's seven original tracks were recorded at various locations in the United States and England.

Hypothesis: the American hard rock band Blue Oyster Cult released their best live album in September 1978.
It's impossible to say