2 key differentiators and 2 examples of anthropology compared to history and sociology.

I found the definitions of each-
Cultural anthropology-study of living people and cultures and they actually live with the people they study
Archaeology- a subclass of anthropology and is the study of past human cultures through material remains and only back to homo sapiens.

History- studies the past as far back as they can go.
Sociology- study of human development and structure.

I am confused on where to find examples to use. Any ideas?