Early humans must have learned how to carry food, water and fire by observing that babies were born in a kind 
(Early humans; must have learned; how to carry food, water and fire by observing that babies were born in a kind) Context(Early humans must have learned,List([0, 30))):(Early humans; must have learned to carry; food, water and fire) Context(Early humans must have learned to carry,List([0, 43))):(Early humans; must have learned to carry food, water and fire by observing; that babies were born in a kind) Context(Early humans must have learned to carry by observing,List([0, 77))):(babies; were born; L:in a kind)
Early humans must have learned,List([0, 30)) Early humans must have learned to carry,List([0, 43)) Early humans must have learned to carry by observing,List([0, 77))
Early humans Early humans Early humans babies
must have learned must have learned to carry must have learned to carry food, water and fire by observing were born
how to carry food, water and fire by observing that babies were born in a kind
food, water and fire
that babies were born in a kind
L:in a kind