identifier('stdtokens')pipe('>')identifier('lowercase')pipe('>')identifier('stopwords')left bracket('(')literal(''a'')comma(',')whitespace(' ')literal(''an'')comma(',')literal(''the)>stem('')identifier('en')
LexException: Unrecognized syntax: '')' at: 
"stdtokens>lowercase>stopwords('a', 'an','the)>stem('en*here*')"
identifier('fas')literal('-324')identifier('we')
LexException: Unrecognized syntax: '?' at: 
"fas-324we*here*?`213ff3*21(+"
