Board is related to Marker. you are likely to find Marker in/at/on Desk. you are likely to find Calendar in/at/on Desk. Calendar is a synonym of Agenda. 
Fever can cause/lead to Headache. Pill can be used for Headache. Pill is related to Form. Form is related to Literature. 
Board <--RelatedTo--> Marker --AtLocation--> Desk <--AtLocation-- Calendar <--Synonym--> Agenda 
Fever --Causes--> Headache <--UsedFor-- Pill <--RelatedTo--> Form <--RelatedTo--> Literature 