Two children of different genders could have any type of relationship between them, or none at all.  The could be a brother and a sister, they could be cousins, and uncle and niece, friends or strangers - there is no way to make a determination based on age and gender.


Context: "Two small children, one boy one girl, walking down a path surrounded by trees."
Hypothesis: A brother and a sister are walking.
Based on the context, is the hypothesis true, false, or unknown?