1. A computer implemented method of analyzing contents in one or more contracts, the method comprising: obtaining primary features from the one or more contracts; grouping, by the primary features, a related portion of the one or more contracts; ordering and linking, by the primary features, the related portion of the one or more contracts; defining an advanced policy group comprising a plurality of policy groups, the plurality of policy groups grouping a plurality of policies, the plurality of policies comprising clause examples to compare against clauses in the related portion of the one or more contracts; verifying each of the plurality of policy groups to generate, for each policy group, a validity of a policy group under the verification; generating a validity of the advanced policy group by examining the validity of the policy group for the each policy group; and analyzing the contents in the related portion of the one or more contracts based on the validity of the advanced policy group.