Task: Question Answering
Input (English): Passage: In an animated sequence, a plane flying through the fictional Bukuvu region in the heart of Africa crashes. A child on board the plane, George, disappears into the jungle and is raised by a sapient, talking gorilla named Ape. Twenty-five years later, George, who enjoys swinging on vines to move about but has a habit of crashing into trees, has grown to be King of the Jungle.
Ursula Stanhope, a San Francisco heiress, tours Uganda with local guide Kwame and a trio of porters. Ursula is tracked down and joined by her fiancé, Lyle Van De Groot, with two poachers named Max and Thor. Kwame tells the group of the "White Ape", a local legend of a superhuman primate that rules the jungle. The next day Lyle, insistent on taking Ursula home as soon as possible, goes into the jungle with her to find the White Ape and they are attacked by a lion. Lyle knocks himself out trying to flee while Ursula is saved by George. George takes Ursula to his treehouse home and cares for her, introducing her to Shep, an African bush elephant that acts like George's dog, and Tookie, a toco toucan. George is smitten with Ursula and attempts to woo her; Ursula reciprocates his attraction, and her time spent with George makes her no longer wish to return home.
Lyle, Max and Thor find the treehouse and Lyle confronts Ursula and George. Max and Thor make to shoot Shep for his ivory, and Ape shouts at Shep to run. Everyone is stunned by the sight of a talking ape and Max and Thor decide to tranquilize and capture him. George runs to stop them and is accidentally shot by Lyle, who thought his gun was a novelty lighter. Lyle and the poachers are imprisoned and Lyle is identified as the shooter by the porters; Max and Thor are released and resolve to capture Ape to make a fortune in Las Vegas. Meanwhile, Ursula takes George home to get medical help for his wound and to see the human world he belongs in. 
Question: What is the last name of the person who confronts George and Ursula?
Output (English): Van De Groot.