you are likely to find Laser in/at/on Laboratory. you are likely to find Rat in/at/on Laboratory. Rat is related to Large. Large is related to Cow. 
Publicity is a type of Quality. Quality is related to Stuff. Stuff is a synonym of Block. Block is related to Cell. 
Laser --AtLocation--> Laboratory <--AtLocation-- Rat <--RelatedTo--> Large <--RelatedTo--> Cow 
Publicity --IsA--> Quality <--RelatedTo--> Stuff <--Synonym--> Block <--RelatedTo--> Cell 