Simplify the following text for a Grade 8 native English-speaking person.
Original: Arlo Guthrie ( born 1947 ) is an American musician and songwriter , and is the son of folk music legend Woody Guthrie .
Simplified: Arlo Davy Guthrie ( born July 10 , 1947 ) is an American folk singer . Like his father , Woody Guthrie , Arlo often sings songs of protest against social injustice .