The evidence for the Yele – West New Britain family comes from the pronouns. Each language has two distinct sets of pronouns, and both sets correspond across the three languages. The forms illustrated here are the free pronouns and subject prefixes of Anêm and Ata, and the free and possessive/prepositional pronouns of Yele. Anêm and Ata make a distinction between inclusive and exclusive we. Yele also has dual pronouns which aren't shown.
Structural Phylogenetics and the Reconstruction of Ancient Language History. Michael Dunn, Angela Terrill, Ger Reesink, Robert A. Foley, Stephen C. Levinson. Science magazine, 23 Sept. 2005, vol. 309, p 2072.
Malcom Ross (2005). "Pronouns as a preliminary diagnostic for grouping Papuan languages." In: Andrew Pawley, Robert Attenborough, Robin Hide and Jack Golson, eds, Papuan pasts: cultural, linguistic and biological histories of Papuan-speaking peoples, 15-66. Canberra: Pacific Linguistics.