I'm using jmeter to test some web services.
I created four Thread groups that run consecutively.

In my second thread group, I have two web services :
The first one reads a CSV file and for each person ID it returns its name and first name :

```
...
<response>
   <name>Foo</name>
   <firstName>Bar</firstName>
</response>
...

```

The second one should take this couple of values and send them to another web service.
I read in the jMeter's documentation than the `Regular Expression Extractor` can do the job.

But how to tell him to get those values and feed the second ws call ?

Thank you,

Patrick.