Given two noun phrases (arguments) and relationship between them, form a sentence that expresses theses arguments with the given relationship.
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Question: Relationship: 'be capital of', Argument/Subject 1: 'vienna', Argument/Subject 2: 'austrium'

Answer: Vienna is the capital city of Austria , a small country of about eight million people .

Question: Relationship: 'be son of', Argument/Subject 1: 'joseph', Argument/Subject 2: 'jacob'

Answer: The biblical Joseph was the 11th son of Jacob .

Question: Relationship: 'invade', Argument/Subject 1: 'north', Argument/Subject 2: 'south'

Answer:
After Communist North Korean forces invaded South Korea on June 25 , 1950 , the war raged up and down the peninsula several times as the United States , the United Nations and finally Communist China sent ground forces there .