You will be given a definition of a task first, then some input of the task.
Given two noun phrases (arguments) and relationship between them, form a sentence that expresses theses arguments with the given relationship.

Relationship: 'be environment for', Argument/Subject 1: 'cygwin', Argument/Subject 2: 'window'
Output:
It is possible to install MPB under Windows by using Cygwin , a free Unix-compatibility environment for Windows .