Irish is a type of Person. Foreigner is a type of Person. Import is a type of Foreigner. Import is related to Trade. 
Arrangement is derived from Arrange. Arrangement is related to Plan. Plan is related to Organized. 
Irish --IsA--> Person <--IsA-- Foreigner <--IsA-- Import <--RelatedTo--> Trade 
Arrange <--DerivedFrom-- Arrangement <--RelatedTo--> Plan <--RelatedTo--> Organized 