Given two noun phrases (arguments) and relationship between them, form a sentence that expresses theses arguments with the given relationship.

[EX Q]: Relationship: 'be version of', Argument/Subject 1: 'pubm', Argument/Subject 2: 'medline'
[EX A]: Our literature search used the PubMed version of Medline on the internet .

[EX Q]: Relationship: 'be city in', Argument/Subject 1: 'zurich', Argument/Subject 2: 'switzerland'
[EX A]: Zurich is the largest city in Switzerland , is a major rail hub and a common starting point for rail excursions into the rest of the country .

[EX Q]: Relationship: 'be chairman of', Argument/Subject 1: 'obama', Argument/Subject 2: 'chicago annenberg challenge'
[EX A]:
Ayers recruited Obama to serve as chairman on the $ 100 million Chicago Annenberg Challenge and they worked together for seven years handing out grants to the 'educational ' projects of people like ... William Ayers .