more work on copula
more work on copula

PhyloStar/UDTelugu,PhyloStar/UDTelugu,UniversalDependencies/docs,UniversalDependencies/docs,UniversalDependencies/docs,PhyloStar/UDTelugu,PhyloStar/UDTelugu,UniversalDependencies/docs,UniversalDependencies/docs,PhyloStar/UDTelugu,PhyloStar/UDTelugu,UniversalDependencies/docs