Premise: Philadelphia Free Press was a 1960s era underground newspaper published biweekly in Philadelphia, Pennsylvania from 1968 to 1972. Originally launched at Temple University in May 1968 as the monthly "Temple Free Press", it separated from Temple and became the "Philadelphia Free Press" in September 1968.
Hypothesis: In 1978, a one-off publication of the Philadelphia Free Press newspaper was released to celebrate 10 years since the release of the first ever issue.