<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _parse_field(self):
 """Parse a Field."""

        name = self._next_token()
        if self._next_token() == '=':
            value = self._parse_value()
            return name, value