To ensure data quality, we avoid users' irresponsible deletion by employing a group-vote scoring mechanism.
when a user deletes the expanded concept e i , he/she gets a score Q = del(e i )/ max e j ∈Ec del(e j )− 1 2 , i.e., every user operation corresponds to a score 9 S ∈ − 1 2 , 1 2 based on all existing deletion data, which means that irresponsible operations subject to a penalty.