Earth is related to Humanity. Humanity is a synonym of Man. 
Mixture is a synonym of Blend. Blend is a synonym of Combine. Combine is a synonym of Join. Join is related to Involved. 
Earth <--RelatedTo--> Humanity <--Synonym--> Man 
Mixture <--Synonym--> Blend <--Synonym--> Combine <--Synonym--> Join <--RelatedTo--> Involved 