((a:0.5,b:0.5)anc1:0.3,c:0.5)anc0:0.1;

a https://raw.githubusercontent.com/UCSantaCruzComputationalGenomicsLab/cactusTestData/master/evolver/mammals/loci1/simMouse.chr6
b https://raw.githubusercontent.com/UCSantaCruzComputationalGenomicsLab/cactusTestData/master/evolver/mammals/loci1/simHuman.chr6
c https://raw.githubusercontent.com/UCSantaCruzComputationalGenomicsLab/cactusTestData/master/evolver/mammals/loci1/simDog.chr6