def from_dict(cls, coll, d):
        """Construct from dict

        :param coll: Collection for the mark
        :param d: Input
        :type d: dict
        :return: new instance
        :rtype: Mark
        """
        return Mark(collection=coll, operation=Operation[d[cls.FLD_OP]],
                    pos=d[cls.FLD_MARK], field=d[cls.FLD_FLD])