name the river whose source place is hopewell township and mouth place is lawrence township ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_sourcePlace dbr_Hopewell_Township,_Mercer_County,_New_Jersey sep_dot var_uri dbo_mouthPlace dbr_Lawrence_Township,_Mercer_County,_New_Jersey sep_dot var_uri a dbo_River brack_close