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Stop generation immediately after outputing the Final Answer.

Ensure that your response strictly follows the format to maintain clarity and consistency. 
Question: Here are some premises:
All people who make wedding plans are people who are engaged.
All people who invite others to come to their ceremony make wedding plans.
Anyone who has a well-attended wedding invites others to come to their ceremony.
Some people that have well-attended weddings have larger families.
If John is engaged, then John does not invite friends to their ceremony and make wedding plans.
If John has a larger family, then either John has a well-attended wedding or invites friends to their ceremony. 
Here is a conclusion:
John is engaged.
Based on the premises, is the conclusion True, False, or Uncertain?
Answer: Uncertain