In Unification Grammars (UGs) the content is important. Content is passed up phrase structure trees by exactly the same feature sharing mechanism that we have seen so far.
![CONTPrinc](https://sp-ao.shortpixel.ai/client/q_glossy,ret_img,w_300/http://www.fujisantrip.com/wp-content/uploads/2015/08/CONTPrinc-300x221.png)
Take a phrase like sees us. If we only have a verb and its complement, we are not able to feature share for the SEER.
![CONTFULL](https://sp-ao.shortpixel.ai/client/q_glossy,ret_img,w_300/http://www.fujisantrip.com/wp-content/uploads/2015/08/CONTFULL-300x233.png)
Just to remind you, here it is again.
![HeSeesUs](https://sp-ao.shortpixel.ai/client/q_glossy,ret_img,w_300/http://www.fujisantrip.com/wp-content/uploads/2015/08/HeSeesUs1-300x260.png)
This structure-sharing is kind of dynamic. It looks a bit like movement! Consider the word seem.
![SeemSpec](https://sp-ao.shortpixel.ai/client/q_glossy,ret_img,w_300/http://www.fujisantrip.com/wp-content/uploads/2015/08/SeemSpec-300x162.png)
Now look at the phrase to like Hanako:
![toLikeHanako](https://sp-ao.shortpixel.ai/client/q_glossy,ret_img,w_300/http://www.fujisantrip.com/wp-content/uploads/2015/08/toLikeHanako-300x144.png)
![Full seems](https://sp-ao.shortpixel.ai/client/q_glossy,ret_img,w_300/http://www.fujisantrip.com/wp-content/uploads/2015/08/Full-seems1-300x149.png)