Please answer a question about the following article about Northwestern University:

In April 2016, Northwestern announced that it signed on to the Chicago Star Partnership, a City Colleges initiative. Through this partnership, Northwestern is one of 15 Illinois public and private universities that will "provide scholarships to students who graduate from Chicago Public Schools, get their associate degree from one of the city's community colleges, and then get admitted to a bachelor's degree program." The partnership was influenced by Mayor Rahm Emanuel, who encouraged local universities to increase opportunities for students in the public school district. The University of Chicago, Northeastern Illinois University, the School of the Art Institute, DePaul University and Loyola University are also part of the Star Scholars partnership.

What City College initiative did Northwestern announce signing on with in 2016?
the Chicago Star Partnership