I'd like to be able to get a layout using Bootstrap that looks as follows:

My code is:
<div class="container">
<div class="row">
<div class="col-12">foo</div>
</div>
<div class="row">
<div class="col-6">bar</div>
<div class="col-6">baz</div>
</div>
Unfortunately, I'm getting something that looks like this (notice that "foo" in row 1 is aligned with "bar" in row 2):
How do I achieve the desired result?
Thanks!
