Simplify the following text for a Grade 11 native English-speaking person.
Original: After the Second World War , she along with RenÃ Cassin , John Peters Humphrey and others , drafted a declaration for the United Nations : UN Universal Declaration of Human Rights .
Simplified: She played an instrumental role , along with RenÃ Cassin , John Peters Humphrey and others , in drafting the Universal Declaration of Human Rights ( UDHR ) .