Because it would be difficult for a bird to learn how to build a nest, the instructions for building a nest are hard-coded into the birds knowledge base.
(it; would be; difficult) (the instructions for building a nest; are; hard-coded into the birds knowledge base) (a bird; to learn; how to build a nest) Context(a bird to learn,List([34, 49))):(a bird; to learn to build; a nest)
a bird to learn,List([34, 49))
it the instructions for building a nest a bird a bird
would be are to learn to learn to build
difficult
hard-coded into the birds knowledge base
how to build a nest
a nest