SimilarityRank
voluntary 0.782 6529
on_a_voluntary_basis 0.603 66073
voluntarily 0.596 16756
Voluntary 0.589 65452
mandatory 0.526 7238
a_community-based 0.504 89904
a_nationwide 0.496 24044
compulsory 0.493 17415
a_statewide 0.484 34182
an_informal 0.481 25146
statutory 0.477 18204
mandate_by 0.476 53169
a_formal 0.475 18306
an_approve 0.470 30644
a_three-year 0.469 50380
a_two-year 0.467 46024
a_private 0.464 7766
an_international 0.461 7481
an_accredit 0.461 84719
an_agree 0.459 90227
a_proactive 0.459 56056
an_independent 0.456 9026
non-governmental 0.456 48577
a_structured 0.450 43386
be_a_not-for-profit 0.450 86688