code: def p_parallelblock(self, p):
          'parallelblock : FORK block_statements JOIN'
          p[0] = ParallelBlock(p[2], lineno=p.lineno(1))
          p.set_lineno(0, p.lineno(1)f p_parallelblock(self, p):
          'parallelblock : FORK block_statements JOIN'
          p[0] = ParallelBlock(p[2], lineno=p.lineno(1))
          p.set_lineno(0, p.lineno(1))
docs: parallelblock : FORK block_statements JOIN