Happen is related to Place. Place is a synonym of Home. you are likely to find Wheelchair in/at/on Home. 
Deem is a synonym of Pretend. you would Pretend because Fool. Fool is related to President. President is related to Officer. 
Happen <--RelatedTo--> Place <--Synonym--> Home <--AtLocation-- Wheelchair 
Deem <--Synonym--> Pretend --MotivatedByGoal--> Fool <--RelatedTo--> President <--RelatedTo--> Officer 