Um , there is a slight complication here which is that when we talk about form it 's useful sometimes to talk about , um  to talk about there also being a designated object and we think that that 'll be the same one , right ? So the ball is the head of the phrase , " the r the  " , um , " big red ball " , and the entity denoted by the word " ball " is sort of the semantic head in some ways of  of this sort of , um , in interesting larger element.
A a and the  Yeah. And there 's  uh there 's ca some cases where the grammar depends on some form property of the head. And  and this enables you to get that , if I understand you right.
Yeah.
Mm - hmm.