Cannon find columns in 'SELECT COUNT(*) FROM examination WHERE 'Examination Date' > '1997-01-01'

[staskikotx]

sql = "SELECT COUNT(*) FROM examination WHERE 'Examination Date' > '1997-01-01'"

from sql_metadata import Parser

parser = Parser(sql)

print(parser.columns)

Outputs:
[]

Expected output:
['Examination Date']