Can we draw the following hypothesis from the context (see options)?

Context:

Felipe Gonzalez Marquez (born March 5, 1942) is a Spanish socialist politician. He was the General Secretary of the Spanish Socialist Workers' Party (PSOE) from 1974 to 1997.

Hypothesis: The PSOE started in the 1950s.
Choose from:
1). Yes;
2). It's impossible to say;
3). No;
2).