premise: Michael George Stroka (May 9, 1938 in Passaic, New Jersey – April 14, 1997) was an American actor on soap operas like ABC-TV's "Dark Shadows", in which he played Aristede, Bruno Hess, and Laszlo Ferrari from 1969 to 1970. In addition, he made a cameo appearance as a pallbearer in the MGM film, "House of Dark Shadows", the first of two feature films based on the ABC soap opera.
hypothesis: Michael George Stroka was on "Dark Shadows" for five years.
reason: Michael George Stroka was only on Dark Shadows from 1969-1970.  This is tricky because the show name does appear in the text.