Columnist is a type of Journalist. Journalist is related to News. News is related to Reading. Reading is related to Educational. 
Camera is related to Telescope. Telescope is related to Astronomer. Astronomer is a type of Scientist. 
Columnist --IsA--> Journalist <--RelatedTo--> News <--RelatedTo--> Reading <--RelatedTo--> Educational 
Camera <--RelatedTo--> Telescope <--RelatedTo--> Astronomer --IsA--> Scientist 