Complex sentence: Overall, pro-self-determination parties won a majority of 87 seats over 135, parties who deny Catalan self-determination right won 28, and the ambiguous Partit dels Socialistes de Catalunya (PSC) won 20.
Split into simpler sentences: Overall, pro-self-determination parties won a majority in parliament, taking 87 of the total 135 seats. Parties opposing the movement toward Catalan self-determination won 28 seats, while the Partit dels Socialistes de Catalunya (PSC), which remained relatively ambiguous on the issue, won 20.