Sentence:  An unusual , if not extraordinary , rendering of the classic myth that involves the rescue of Prometheus from the <WSD>rock</WSD> by the U.S. Cavalry was given last week in the warehouse of the Albany Leather Conduit Company amid cheers of `` Hubba hubba '' and `` Yalagaloo pip pip '' ! 
Meaning of the word marked with <WSD> tags:  a lump or mass of hard consolidated mineral matter