Please answer the following question: I am a movie director and I just received the following movie plot. Could you help me answer this question? If not, let me know by writing "Not answerable". Plot title: Walkabout Movie plot: Somewhere in harbourside Sydney, Australia, a family lives within a high-rise apartment building where the mother is preparing a meal and listening to the radio. Her fourteen year old daughter (Jenny Agutter) and six year old son (Luc Roeg) swim in the building's pool overlooking a view of the ocean while their father (John Meillon), deep in troubled thought, watches them from their balcony.One day, the father takes his children, still in their school uniforms, on a picnic into the Outback. He parks the car and reads while his daughter sets up a blanket with their lunch. Her brother plays nearby with his water gun and toy soldiers. Suddenly, and for reasons unclear to his children, the father announces it is time to go and brandishes a gun, firing several shots at them. The boy thinks it all to be a game but his sister understands the danger and shields her brother as they run from their mad father. She watches in horror as her father returns to the car and sets it on fire before seating himself within and putting a bullet into his head. Quickly, and keeping her brother's eyes averted, the girl retrieves their radio, a scarf, and what food she can carry before setting off into the wilderness with her brother.The siblings walk for hours under the hot sun, calmed by irrelevant radio broadcasts, and walking past a host of wild creatures. Come nightfall, they make a crude camp for themselves, much to the boy's delight. In the morning, the girl leads them up a rocky hillside where she hopes to find some bearings. However, she can see nothing but a broad spanse of wilderness. When they finish their lemonade, the girl opens a can of vegetables from which they drink the juice. Recalling an uncle's story of military training, the girl suggests they eat salt to retain water and surmises to her brother that they may spend some time in the desert. She remains stoic, but wary, while her brother is blissfully unaware of their situation, remaining entertained by the radio and his toys. Eventually, after becoming filthy and... My question: who learn to communicate slightly using words and sign language?
Answer:
The boys