Rule reminder
Summary: vedere/sentire/ascoltare/guardare + bare infinitive (direct perception); vedere/sentire che + indicative (indirect/reported); accorgersi/rendersi conto di + noun or infinitive (same subject), che + indicative (different subjects); notare + noun, che + indicative, or + infinitive (direct observation).
Ho visto _____ il treno in ritardo. (I saw that the train was late.)