Our state's Department of Education maintains a database of colleges in the state. Each college has a name, a code, and the count of students currently enrolled. Each college may have more than one campus. Each campus has a name that is unique within the college and has an address. More than one campus of a college may be located in the same city. Cities are identified by name. A city may contain campuses of more than one college.

The entities are College, Campus, and City.

What are the attributes of each entity?