Hi there I have a question on my exam that looks like that:

"Compare the sentences below . Provide the underlying deep structure of a) describe the transformation and provide the motivation for it. Why is b) ungrammatical?

a) It is clear that John didin't see the play.

b)* It is clear the news.

Ok, if it comes to the sentence a) It is clear [that John didn't see the play] part in bracket is a noun clause (object noun clause), the noun clause as the name itself says it must have a subject (John), finite verb (didn't) and object (the play); it is the result of extraposition??? [that John didn't see the play] is clear.

Why the second is ungrammatical??? it is clear [the news] in bracket NP

There's sth in my book said that Noun clauses fills the position of a noun phrase in the matrix clause and then there are examples that in sentences beginning with 'it' are also noun clauses and that there are no corresponding sentences with the noun phrases. But why????? Please help me!