Regarding the first of the two sentences you quoted: While the two conjunctions do make it hard to parse, I don't see why there should be a definitive article i

Regarding the first of the two sentences you quoted: While the two conjunctions do make it hard to parse, I don't see why there should be a definitive article in it. I'll reword it for you: While we're listening to a German sentence, the choice of the next noun can be restricted by gendered articles and adjectives.