Read the texts carefully and choose the correct answers.

The following text is for questions 16 to 20.

A Shock in the Middle of the Night

    I travelled with my father to Cilacap by bus last month. We started from Semarang at five in the afternoon. My father told me that it would take six hours. My father and I sat right behind the driver. Soon, I fell asleep. I woke up several times to change my position. I heard father talking with the driver.

    At half past ten, I woke up. I knew that we were approaching Cilacap, so I decided not to go back to sleep. I saw my father was asleep at that time.

    The bus sped along in the middle of the night. I was enjoying the lamps along the street through the window next to me when suddenly I saw a cow in front of the bus. The bus driver braked immediately. All the passengers were startled and woke up. The driver assured us that there was no accident. A cow suddenly came out of nowhere and tried to cross the street, but the bus successfully avoided a collision with it. The passengers went back to sleep and our journey continued.

When did the accident occur?