Structural is related to Support. Support is related to Purpose. Purpose is a synonym of Mean. Mean is related to Statistics. 
Decision is a synonym of Conclusion. Conclusion is related to Theory. Theory is related to Statement. 
Structural <--RelatedTo--> Support <--RelatedTo--> Purpose <--Synonym--> Mean <--RelatedTo--> Statistics 
Decision <--Synonym--> Conclusion <--RelatedTo--> Theory <--RelatedTo--> Statement 