Complex sentence: Against the wishes of her hard-bitten mother (Kate Nelligan) they marry, but before long financial woes lead to his doing what every other uneducated young man does in the town: take a job underground.
Split into simpler sentences: Against the wishes of her hard-bitten mother (Kate Nelligan), they marry. But, before long, financial woes lead to his doing what most unemployed young men do in the community: take a job underground.