Oral is related to Talk. Shout is a type of Talk. Shout is related to Scream. Scream is a type of Film. 
Laser is a type of Light. you are likely to find Laser in/at/on Hospital. 
Oral <--RelatedTo--> Talk <--IsA-- Shout <--RelatedTo--> Scream --IsA--> Film 
Light <--IsA-- Laser --AtLocation--> Hospital 