you are likely to find Class in/at/on Conference. Class is related to Educational. Educational is related to College. 
Forest is related to Multiple. Multiple is related to Repeat. Repeat is a type of Act. Act is related to Protest. 
Conference <--AtLocation-- Class <--RelatedTo--> Educational <--RelatedTo--> College 
Forest <--RelatedTo--> Multiple <--RelatedTo--> Repeat --IsA--> Act <--RelatedTo--> Protest 