Agnes, Pedro, roberts, xavi, santi and David are sitting in a row, santi and David are in the centre, Agnes and Pedro are at the end, Robert is sitting left of Agnes, who is right of Pedro ?

Xavi

Explanation:

P X S D R A

the letters represent their names.

the sentence does not violate the phrase structure second rule (introduced by noam chomsky) because noun phrases consist of a determiner such as a, the or every, and a noun. in the sentence, the noun phrase the cake includes a determiner (the) and a noun (cake).

on the other hand, the first rule indicates that a sentence encloses a noun phrase, followed by a verb phrase. the example sentence can be analysed as follows:

john (n) + ate (v) + the (det) + cake (n).