What is a complex sentence.

18/5/20 WALT: Understanding what a complex sentence. We were learning what a complex sentence is these are some that I did! My little sister is irritated when I watch youtube because she always throws ice cubes at me. A dolphin jumped up from the water and smacked the dodge ball as he chanced my brother. The little kid saw the famous British astronaut Tim Peake and said which astronaut is that. The house on the hill remained unsold because it was owned by Robert Downy who's a famous actor that would never give it up. Lion lying on the floor licking his paw even though he needs to eat as the dinosaur stomp at the car smelling some fresh meat and seeing a human from the reflection of the side Mira. A cow and his owner in a farm with a bunch of grass in the middle of nowhere and then a ship came and took the cow away to take it to space to milk the cow and the owner was upset so he thought of a plan… As this lady was trying to get better at diving she went for a dive, tripped over into the water, and back slapped her since she back slapped her and was having a rest until… After he broke the world record he got a free burger from burger king. Before science was an interesting subject it was never interesting.