The sentence "Chris opened a box with a hammer" is ambiguous. Draw two phrase structure trees for this string of words, one for each meaning that the string can convey. Note that, in one meaning, the string of words conveys that Chris used a hammer to do what he did, while in the other meaning, the string of words means that the box has a certain tool in it. None of this information matters to what _words_ (lexical items) are in two trees, this info is just to help comprehend the ambiguity. To be explicit: Do NOT draw trees for the words in the two paraphrased meanings, but DO draw two trees that contain only the string of words above in quotes, which has two trees associated with it, one related to each meaning. Structure tree making website: http://ironcreek.net/syntaxtree/ Reference: https://web.mit.eduorvin/www/24.902/phrasestructure.html#:~:text=Two%20nodes%20that%20have%20the,and%20NP%20are%20therefore%20sisters.&text=%E8%BF%99%E4%BA%9B%20phrase%20%20structure%20rules%20say,%2C%20T%2C%20and%20VP%22%E3%80%82

Now our grammar predicts that The uffy cat slept is a sentence, since we can construct the phrase structure tree in (8). (3) S A NP VP A | De! N slept l /\\ the Adj N uffy cat In this tree, as always, the forms of the lexical expressions are the leaves. The syntactic category names that occur right above the leaves represent the syntactic categories of lexical expressions, in accordance with the lexical entries. The tree also shows that the immediate constituents of this sentence are NP and VP (rule 4), that the immediate con- stituents of NP are Det and N (rule 6}, and that the immediate constituents of the higher occurrence of N in the tree are Adj and N (rule 7). Reading the leaves of this entire tree from left to right gives us the string The uffv cat slept, the form of the whole sentence whose structure this tree represents. Our grammar now predicts that Sally gave Bob this dog is a sentence, which we can repre- sent by means of the phrase structure tree in (10). (10) S NP VP Sally DTV NP NP gave Bob Det N this dog