Right node raising

I encountered a difficult question for syntax.

The authors discuss a special case of coordination called “right node raising”. When both conjuncts have the same string (e.g. typically an object or a complement, i.e. underlined strings) (i.e. (1a), (2a) and (3a)), the shared string (i.e. wavy underlined strings) can appear only once at the end of the clause or “right node raised” (i.e. (1b), (2b) and (3b)).

(1)
a. They play unusual music, and I listened to unusual music.
b. They play and I listened to unusual music.

(2)
a. Everyone claims that John lied, but Mary does not believe that John lied.
b. Everyone claims but Mary does not believe that John lied.

The question is:

Based on the coordination test results in (1b)—(2b), discuss which
structures above the data support.

Paul claim that the well-formedness of (1b), (2b) implies an
unexpected structure involving the verb and modal.discuss why the test
results in Part A are unexpected. Whenever appropriate, include
relevant examples in your answer.