An Oval Office meeting

Mr. Mueller is also interested in an Oval Office meeting Mr. Trump had with Russian officials in which he said the dismissal of the F.B.I. director had relieved “great pressure” on him. (NYT.)

Is an Oval Office meeting Mr. Trump had with Russian officials in which he said the dismissal of the F.B.I. director had relieved “great pressure” on him a noun phrase composed of the head "an Oval Office meeting" modified by three subordinate clauses: two of them adjectival (relative) and one content (noun) clause?