A <class 'sqlparse.sql.Identifier'>
, <class 'sqlparse.sql.Token'>
<class 'sqlparse.sql.Token'>
ROLE <class 'sqlparse.sql.Token'>
ROLE <class 'sqlparse.sql.Token'>
, <class 'sqlparse.sql.Token'>
<class 'sqlparse.sql.Token'>
B <class 'sqlparse.sql.Identifier'>
role is also a field name.