TASK DEFINITION: In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
PROBLEM: 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Walter Cowan had demanded that the Finnish squadron patrolling the area had to stay until the British forces had withdrawn.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.  Question: WHich countries participated in the Treaty that returned Silatch to the Soviet Union?

SOLUTION: Answer: Russia

PROBLEM: Passage: Gradually Clayburgh shifted into being more of a supporting character actress in the 90s, taking on roles as diverse as an antagonistic judge in Trial: The Price of Passion (1992) and the interfering wife of Alan Alda's character in Whispers in the Dark (1992). After appearing in Ben Gazzara's Beyond the Ocean (1990), which was shot in Bali, and the unreleased Pretty Hattie's Baby (1991), she became typecast as an attractive maternal figure: she was the long-missing matriarch in Rich in Love (1992), a wheelchair-bound mom in Firestorm: 72 Hours in Oakland (1993) and Eric Stoltz's single mother in Naked in New York (1993). A review in People magazine felt Clayburgh "[did] her best as the footloose mother" in Rich in Love, while Roger Ebert praised her casting in Naked in New York as "exactly on target". She also played Kitty Menendez who was murdered by her sons in Honor Thy Father and Mother: The True Story of the Menendez Murders (1993), a role which Variety perceived to be "incomplete, but that has more to do with the script than Clayburgh’s performance." She continued to play concerned, protective mothers in For the Love of Nancy (1994), The Face on the Milk Carton (1995), Going All the Way (1997), Fools Rush In (1997), When Innocence Is Lost (1997) and Sins of the Mind (1997), and was in "good form" as the forceful, pushy stage mother in Crowned and Dangerous (1997).
 Link Information: none Question: How many movies were directed byt the director of Beyond the Ocean?

SOLUTION: Answer: none

PROBLEM: 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: 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. Question: How old was the Finnish Navy when it lost one fifth of its ships?

SOLUTION:
Answer: 1