An enzyme is a catalyst that helps to speed up the rate of a reaction by lowering the activation energy of a reaction. There are many enzymes in the human body, without which lots of important reactions would never take place. Cellular respiration is one example of a reaction that is catalysed by enzymes.
Sullivan Act Tim Sullivan, a major Irish criminal passed the Sullivan Act in 1911 to help his constituents rob strangers or to help them against Italian incomers. That is the crux of story that goes with a very early gun control law.
The Beatles performed this on their third live Ed Sullivan Show appearance - September 12, 1965. Before The Beatles broke through in America, Sullivan was in the London airport when The Beatles returned from a tour of Sweden. When he saw the massive crowd there to greet them, he thought The Queen was arriving.