Monday, February 25, 2019

Parse trees for Assignment #12

Sentence to parse:
My next essay will be about a picture which I will be selecting from a big album.
The first failed attempt.
After the suggestion to replace the compound sentence by two simple sentences which would convey the same meaning:

First sentence.
Second sentence.
The above is incorrect, because the NP from the previous sentence, namely "a picture", is missing. It should be:
I will be selecting a picture from a big album.
The second failed attempt.
In the following picture the incorrect fragments have been enclosed in numbered boxes. The comments below correspond to these boxes:
  1. There is no rule: VP --> NP PP
  2. The correct parse tree should have only one root, in this case it should be S.
  3. There is no rule: VP --> VP NP
  4. There is no rule: NP --> PP
  5. The movement is wrong: NP cannot undergo a change to VP during the movement.
Incorrect fragments are enclosed in boxes.
Correct parse:

The number in red next to a tree node is the number of the rule applied to create this node. For example, 6 corresponds to the rule: VP --> (Aux) (Aux) V ( [ NP PP ] ).

The above sentence could be parsed in other ways as well, but considering the rules introduced so far (shown below), is seems to be the only one possible.

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