Teacher:In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Teacher: Now, understand the problem? Solve this instance: He was the son of Walter Stewart and Marjorie Bruce .
Student:
He was the son of Walter Stewart , 6th High Steward of Scotland and of Marjorie Bruce , daughter of the Scottish king Robert the Bruce by his first wife Isabella of Mar .