How to make an a href do its work when it's inside another class that triggers an event whenver clicked

The question above might not be clear enough, so I will give an example as well:

For example, I have the following html code:

<ul class="do-sth">
    <li>Line 1</li>
    <li>Some text. <a href="http://www.google.com">Line 2.</a> Other text</li>
</ul>

The do-sth class triggers some even whenver it got clicked. So when I click Line 2, it will trigger that do-sth event and at the same time transferring to the href link. This is NOT what I want. What I would like to have is that whenever I click Line 2, the do-sth is not triggered. How to do that?