PERSON@1 -LRB- or ; -RRB- -LRB- NUMBER@1 May NUMBER@2 -- NUMBER@3 November NUMBER@4 -RRB- was a prolific 19th century MISC@1 philosopher and theologian .

PERSON@1 -LRB- NUMBER@1 May , NUMBER@2 -- NUMBER@3 November , NUMBER@4 -RRB- , a 19th century MISC@1 philosopher and theologian , is usually thought of as the first existentialist philosopher .
