What is the definition of “the baseline of parent box”?

Question

I have trouble understanding the following excerpt from 10 Visual formatting model details – W3C.

The excerpt:

baseline: Align

Answer 1

Look at this picture to see what exactly is the baseline.

Now, let's demonstrate what the doc want to say:

When you define the vertical-align: baseline then the element is aligned to the baseline of the parent element's baseline as in the above picture.