Mathematics is related to Calculation. Calculation is related to Measure. Measure is a type of Decide. Decide is related to Take. 
Mother is related to Relative. Truth can be Relative. 
Mathematics <--RelatedTo--> Calculation <--RelatedTo--> Measure --IsA--> Decide <--RelatedTo--> Take 
Mother <--RelatedTo--> Relative <--HasProperty-- Truth 