In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.

Passage: Dr. John Rollason (Peter Cushing), his wife, Helen (Maureen Connell), and assistant, Peter Fox (Richard Wattis), are guests of the Lama (Arnold Marlé) of the monastery of Rong-buk while on a botanical expedition to the Himalayas. A second expedition, led by Dr. Tom Friend (Forrest Tucker) accompanied by trapper Ed Shelley (Robert Brown), photographer Andrew McNee (Michael Brill) and Sherpa guide Kusang (Wolfe Morris), arrives at the monastery in search of the legendary Yeti or Abominable Snowman. Rollason, despite the objections of his wife and the Lama, decides to join Friend's expedition. Whereas Rollason is motivated by scientific curiosity to learn more about the creature, Friend seeks fame and fortune and wants to capture a live Yeti and present it to the world's press.
 Link Information: Forrest Meredith Tucker (February 12, 1919 – October 25, 1986) Answer: Robert Brown
Which of the actors that played Dr. Tom Friend and Ed Shelley died most recently?

Passage: One day, in the Cretaceous Period, as a Tyrannosaurus named Rex is about to devour a smaller dinosaur, he has captured by a flying saucer piloted by an alien named Vorb. He recruits him and several other dinosaurs (including Bgon the Apatosaurus, Woog the Triceratops, Jorbl the Saurolophus, Spike the Stegosaurus, Dwig the Deinonychus, and Pteri the Pteranodon) he has found for a trial of a special "vitamin" he has developed which, upon feeding it to the dinosaurs, causes them to become sentient. Vorb takes them aboard his saucer and they travel to the present, dropping them off in New York City, which at that moment is celebrating the Macy's Thanksgiving Day Parade. The dinosaurs pretend to be inflatable balloons to sneak along with the parade, but Rex mistakes one of the real dinosaur balloons to be his Allosaurus friend Worgul. The ruse is broken as a result of him accidentally popping "Worgul" and the dinosaurs flee as the crowd panics in sight of them. The police come to capture the dinosaurs soon after, but the helpful curator of the American Museum of Natural History, Dr. Miriam Bleeb, takes the dinosaurs in, and hides them from the cops by having them pretend to be life-size model dinosaurs. This satisfies the police, who leave to search for the dinosaurs elsewhere, and the curator lets them stay for the night. She reads them a bedtime story about a trilobite who wanted to walk on land, while the dinosaurs watch out the window, unsure about their future. 
 Link Information: none Answer: none
Who is the current curator of the museum featured in "We're Back! A Dinosaur's Story"?

Passage: On 4 May 1918, in the aftermath of the Finnish Civil War, Silatch arrived secretly in Kotka, Finland, to evacuate remaining members of the Finnish Red Guard. However, she was confiscated by the Finns and joined the Finnish icebreaker fleet as Ilmarinen, after the legendary hero from Kalevala. In December 1919 she was sent to Koivisto to assist three Finnish torpedo boats, C1, C2 and C3 that had been surrounded by ice some thick. The 150-ton torpedo boats had participated in the British campaign in the Baltic, and Admiral Walter Cowan had demanded that the Finnish squadron patrolling the area had to stay until the British forces had withdrawn. Despite the efforts of Ilmarinen, the weak-hulled torpedo boats were crushed by the ice, and the newly founded Finnish Navy lost one fifth of its ships. After the winter of 1919 Ilmarinen was laid up until she was returned to the Soviet Union according to the Treaty of Tartu. In turn the Soviets gave back the Finnish icebreaker Avance. The name Ilmarinen was later given to a Finnish coastal defence ship launched in 1931.
 Link Information: The treaty confirmed that the Finnish-Soviet border would follow the old border between the autonomous Grand Duchy of Finland and Imperial Russia.  Answer: Russia

WHich countries participated in the Treaty that returned Silatch to the Soviet Union?