Complex sentence: Roberto Agustin "Robert" Trujillo (born October 23,1964) is an American musician and songwriter best known as the current bass guitarist of the heavy metal band Metallica, a position he has held since 2003.
Split into simpler sentences: Roberto Agustin "Robert" Trujillo (born October 23,1964) is an American musician and songwriter. He is known as the current bass guitarist of the heavy metal band Metallica, a position he has held since 2003.