first-child

[arbaev]

Hi!

I am a bit confused by the work of pseudoclass "first-child" selector.
I have next simple setup:

<table>
    <tr>
        <td>first</td>
        <td>second</td>
        <td>third <strong>strong</strong></td>
        <td>last</td>
    </tr>
</table>

And then I want to select only first td:

user=> (map html/text (html/select (get-my-html) [:tr html/first-child]))
("first" "strong" )

Why is there strong?
How to avoid of selecting children of a child elements?
Thanks!