If an animal sacrifices its life for its siblings' offspring, it ensures the survival of shared genes for, by common descent, it shares 50% of its genes with each sibling and 25% with each siblings' offspring.
(an animal; sacrifices; its life; for its siblings' offspring) (it; ensures; the survival of shared genes) Context(it ensures,List([62, 72))):(it; shares; 50% of its genes; with each sibling and 25% with each siblings' offspring)
it ensures,List([62, 72))
an animal it it
sacrifices ensures shares
its life for its siblings' offspring
the survival of shared genes
50% of its genes with each sibling and 25% with each siblings' offspring