Program is a type of Announcement. Program is related to Weather. Weather is related to Mild. 
Sad is related to Feel. Feel is related to Have. Wear is a type of Have. Wear is related to Cotton. 
Announcement <--IsA-- Program <--RelatedTo--> Weather <--RelatedTo--> Mild 
Sad <--RelatedTo--> Feel <--RelatedTo--> Have <--IsA-- Wear <--RelatedTo--> Cotton 