* A researcher affiliated with a university: This means the researcher might hold a position at the university (professor, postdoc, etc.), use university resources, or be officially recognized as part of the university's community, even if they aren't a formal employee.
* A hospital affiliated with a medical school: This indicates a collaborative relationship where the hospital might provide clinical training for medical students, participate in research initiatives with the school, or share resources.
* A student organization affiliated with a student government: The student organization is officially recognized by the student government and might receive funding or support from them.
In short, "institution affiliated" suggests a formal or informal link that provides legitimacy, resources, or other benefits to the affiliated entity. The specific meaning depends entirely on the context.