Complex sentence: The space roar is a radio signal from outer space discovered by NASA's Alan Kogut and his team, and announced at the 213th meeting of the American Astronomical Society on January 7,2009.
Split into simpler sentences: The space roar is a radio signal from outer space. Discovered by NASA's Alan Kogut and his team, space roar was announced at the 213th meeting of the American Astronomical Society on January 7,2009.