M121: Chapter 3: Core Aggregation - Combining Information Lab - Using $lookup

In my opinion, there is either mistake in regex or incomplete description of Lab. I am not sure if airplane with value “380 744” should be counted to the result or not. If not you will get different result and if yes, it could be good to mention it explicitly in description of Lab to save time of people with finding issue in their result.

Hi @Peter_Gvizd, welcome to the community.
Thank you for your feedback, I will forward this to the appropriate team to make a suitable fix to make the description of the lab clearer.

In case you have any doubts, please feel free to reach out to us.

Thanks and Regards.
Sourabh Bagrecha,
Curriculum Services Engineer

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