Focus is a type of Concentration. Focus is related to Determination. Determination is a synonym of Decision. Appointment is a type of Decision. 
Solution is related to Math. Math is related to Pie. Pie is a synonym of Pizza. Pizza is a type of Dish. 
Concentration <--IsA-- Focus <--RelatedTo--> Determination <--Synonym--> Decision <--IsA-- Appointment 
Solution <--RelatedTo--> Math <--RelatedTo--> Pie <--Synonym--> Pizza --IsA--> Dish 