I am doing a research project on Recommender System, where I need data of user-item ratings and user-user trust ratings. Publicly available similar datasets are
Both have user-item ratings but don't have user-user trust ratings; instead they have user-user trust statement. Also they only contain positive trust statement and don't have negative trust statement.
The difference between statement and ratings is, statement can only have value of 1(trusted) or -1(not trusted), but rating will have values in range 0-5 or 0-1.
So is there any prior work on this type dataset and where can I find these type dataset?