which sentence is better?

Workers employed by the trade union which represents airline pilots are staging a 24-hour strike after talks aimed at resolving a row over pensions broke down. – This sentence is too long so readers cannot easily figure out who is who and who did what.

Workers employed by the trade union, which represents airline pilots, are staging a 24-hour strike after talks aimed at resolving a row over pensions broke down. – This sentence is best because the commas make a clear separation of the relationship and its corresponding action.

Workers employed by the trade union that represents airline pilots are staging a 24-hour strike after talks aimed at resolving a row over pensions broke down. – This sentence has the same problem of the first sentence.

BAGGIO, you are missing a 'the' in front of the word 'best'.

Workers employed by the trade union which represents airline pilots are staging a 24-hour strike after talks aimed at resolving a row over pensions broke down
勞工使用附近表現航線飛行員的職業工會在不帶女伴參加晚會24-小時罷工之後談話指望解決輕易劃蠃養老金故障.