"Who Killed Marilyn?" is a song by Glenn Danzig, about questions surrounding the death of actress Marilyn Monroe, with the titular question suggesting she was murdered. Though Danzig's first solo single, the song has since been included on various collections by Danzig's group The Misfits.
We cannot tell how many Glenn Danzig solo albums contain the song "Who Killed Marilyn?"
The statement is definitely correct as Glenn Danzig solo "albums" are not discussed in the example. I'm confused why the system isn't picking this one up. When I entered "we don't know if Marilyn Monroe was actually killed or not" it picked up on that at 99.99%. It might be the word "cannot". 
( z1 possible :polarity - :ARG1 ( z2 tell :ARG0 ( z3 we ) :ARG1 ( z4 thing :quant-of ( z5 album :mod ( z6 solo ) :poss ( z7 person :name ( z8 name :op "Glenn" :op "Danzig" ) ) :ARG0-of ( z9 contain :ARG1 ( z10 song :name ( z11 name :op "Who" :op "Kill" :op "Marilyn" ) ) ) ) ) ) )