Fill is related to Action. Action is related to Decide. Decide is related to Conclusion. 
Curtain is related to Stage. Stage is related to Step. Step is related to Placement. Placement is related to Side. 
Fill <--RelatedTo--> Action <--RelatedTo--> Decide <--RelatedTo--> Conclusion 
Curtain <--RelatedTo--> Stage <--RelatedTo--> Step <--RelatedTo--> Placement <--RelatedTo--> Side 