Flour is a type of Convert. Convert is a type of Person. Governor is a type of Person. Governor is a type of Executive. 
Astronomer is a type of Worker. Astronomer is related to Telescope. Telescope is related to Instrument. 
Flour --IsA--> Convert --IsA--> Person <--IsA-- Governor --IsA--> Executive 
Worker <--IsA-- Astronomer <--RelatedTo--> Telescope <--RelatedTo--> Instrument 