Extend is a synonym of Strain. Strain is a type of Effort. 
you are likely to find Newspaper in/at/on Porch. you are likely to find Plant in/at/on Porch. Plant is related to Bush. Bush is a type of Supply. 
Extend <--Synonym--> Strain --IsA--> Effort 
Newspaper --AtLocation--> Porch <--AtLocation-- Plant <--RelatedTo--> Bush --IsA--> Supply 