Problem: The Gothic vault, unlike the semi-circular vault of Roman and Romanesque buildings, can be used to roof rectangular and irregularly shaped plans such as trapezoids. The other structural advantage is that the pointed arch channels the weight onto the bearing piers or columns at a steep angle. This enabled architects to raise vaults much higher than was possible in Romanesque architecture. While, structurally, use of the pointed arch gave a greater flexibility to architectural form, it also gave Gothic architecture a very different and more vertical visual character than Romanesque.
What structural benefit is offered by the Gothic vault?
The answer is the following: channels the weight onto the bearing piers or columns at a steep angle

Problem: Italian unification was the political and social movement that annexed different states of the Italian peninsula into the single state of Italy in the 19th century. There is a lack of consensus on the exact dates for the beginning and the end of this period, but many scholars agree that the process began with the end of Napoleonic rule and the Congress of Vienna in 1815, and approximately ended with the Franco-Prussian War in 1871, though the last città irredente did not join the Kingdom of Italy until after World War I.
When did the Italian Unification occur?
The answer is the following: in the 19th century

Problem: The record attendance for an Everton home match is 78,299 against Liverpool on 18 September 1948. Amazingly, there was only 1 injury at this game-Tom Fleetwood was hit on the head by a coin thrown from the crowd whilst he marched around the perimeter with St Edward's Orphanage Band, playing the cornet. Goodison Park, like all major English football grounds since the recommendations of the Taylor Report were implemented, is now an all-seater and only holds just under 40,000, meaning it is unlikely that this attendance record will ever be broken at Goodison. Everton's record transfer paid was to Chelsea for Belgian forward Romelu Lukaku for a sum of £28m. Everton bought the player after he played the previous year with the team on loan.
How much did Everton FC pay to transfer Belgian forward Romelu Lukaku?
The answer is the following: £28m

Problem: On December 30, 1922, the First Congress of the Soviets of the USSR approved the Treaty on the Creation of the USSR, by which Russia was united with the Ukrainian Soviet Socialist Republic, Byelorussian Soviet Socialist Republic, and Transcaucasian Soviet Federal Socialist Republic into a single federal state, the Soviet Union. Later treaty was included in the 1924 Soviet Constitution,[clarification needed] adopted on January 31, 1924 by the Second Congress of Soviets of the USSR.
On what date was the 1924 Soviet Constitution adopted?
The answer is the following:
January 31, 1924