Using the database depicted below,how many primary keys are in the database? 
Definitions:
Social Values
Collective ideals that are considered significant and beneficial for the welfare and cohesion of society.
Innovation
The process of translating an idea or invention into a good or service that creates value or for which customers will pay.
Positive Change
Modifications or adjustments leading to improvement and adding value to a situation or process.
Complexity
The state or quality of being intricate or complicated, often referring to systems, organizations, or problems with multiple interrelated parts.
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