PERSON@1 `` PERSON@2 -LRB- born May NUMBER@1 , NUMBER@2 -RRB- is an MISC@1 folk singer and a key figure in the mid-20th century MISC@1 folk music revival .

PERSON@3 -LRB- born May NUMBER@1 , NUMBER@2 in LOCATION@1 , LOCATION@2 -RRB- is an MISC@1 folk musician and songwriter .
