Instructions: From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.
Input: Given Relationship: 'be son of', Sentence: 'She married John William Henry Dalrymple , 7th Earl of Stair , son of General William Dalrymple and Marianne Dorothy Harland , on 28 May 1804 .'
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
son