Careful is similar to Particular. Particular is similar to Specific. Specific is a different concept from Animal. 
Train is related to Engine. Engine is related to Internal. Internal is the opposite of External. External is a type of Feature. 
Careful <--SimilarTo--> Particular <--SimilarTo--> Specific <--DistinctFrom--> Animal 
Train <--RelatedTo--> Engine <--RelatedTo--> Internal <--Antonym--> External --IsA--> Feature 