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-If we want to add the relationship "Published-in" between Book and Country and indicate the number of copies of the book sold (copies-sold) in the countries,copies-sold would be:
Conflict
A struggle or clash between opposing forces or ideas, which can occur on an interpersonal, group, or international level.
Successful Stepfamilies
Blended families that manage to navigate the challenges of bringing together parents and children from previous marriages successfully.
Couple Relationship
A romantic or sexual relationship between two people.
Rewards
Benefits or positive feedback given for a specific behavior, encouraging repetition of such behavior.
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