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Okay, now that weamp;#39;ve learned about arrays, letamp;#39;s look at some other ways that queries can get inside of documents in MongoDB. You know that our automobile collection contains fields with some nested documents. For example, thereamp;#39;s a dimensions field that contains entries for weight, wheelbase, et cetera. In MongoDB, we can query for values inside nested documents. Using a dot notation syntax. Hereamp;#39;s an example. Here Iamp;#39;ve written a query that will retrieve all autos with the weight greater than 5000. Now note that Iamp;#39;m digging into the dimensions field using this dot notation and accessing the weight field of this dimension sub-document. So letamp;#39;s take a look at the results. And what Iamp;#39;m going to do here, is just get a count. Okay. Now these weights are in kilograms. So for my fellow Americans, a kilogram is a little more than two pounds. What weamp;#39;re going to do here is, see what happens as we increase the weight here.