Dancing can cause/lead to Happiness. Happiness is related to Hope. Hope is a synonym of Trust. 
Film is related to Camera. you are likely to find Lens in/at/on Camera. Lens is related to Focus. 
Dancing --Causes--> Happiness <--RelatedTo--> Hope <--Synonym--> Trust 
Film <--RelatedTo--> Camera <--AtLocation-- Lens <--RelatedTo--> Focus 