Variable Extractor with dynamic values

Hi!
I want to extract option value from this :
<optgroup label="Available Parties"> <option value="j8bhflpNr1qieNwELodNYQ">

Problem is, the optgroup label is sometime called "Available Parties" or sometime "Party Disponibles". The response difference comes from interface language setting of end-user.

Is it possible, in the extractor, to have my optgroup label dynamic where I could say to my extractor to use either of the two labels?

Thanks and have a nice day!