Practical is related to Sense. 
Express is related to Train. you are likely to find Human in/at/on Train. you are likely to find Human in/at/on Apartment. you are likely to find Bed in/at/on Apartment. 
Practical <--RelatedTo--> Sense 
Express <--RelatedTo--> Train <--AtLocation-- Human --AtLocation--> Apartment <--AtLocation-- Bed 