Read the following premise and answer if the hypothesis is true.
Glenn Martin Christopher Francis Quinn (May 28, 1970 – December 3, 2002) was an Irish actor in television and film, known for playing Mark Healy in the American sitcom "Roseanne", and Doyle, a half-demon, on "Angel", a spin-off series of "Buffy the Vampire Slayer".
Hypothesis: Glenn Martin Christopher Francis Quinn is an Irish actor known for playing a half-demon, half-angel.. Is the answer "Yes", "No", or "It's impossible to say"? Respond with only the answer and no additional text.
It's impossible to say
It's impossible to say.