sentences:  On November 5, 1773, summoned by the Sons of Liberty, a huge crowd assembled outside the coffee house to denounce the Tea Act, and agents of the East India Trading company who were handling cargoes of dutied tea.It was perhaps the first public demonstration in opposition to the Tea Act in the American colonies.The park, formerly called Liberty Plaza Park, was created in the early 1970s by Pittsburgh-based U.S. Steel in return for a height bonus for an adjacent building at the time of its construction.