In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

People escaping during this event utilized the McCorkell Line to seek passage to Canada and US. In the country where this took place, it is referred to as ""an Gorta Mor"" or ""an Drochshaol. "" One response to this event was Robert Peel's decision to repeal the Corn Laws. Thought to be caused an oomycete known as Phytophthora infestans, this event resulted in approximately a million deaths. For 10 points, name this massive dying caused by a blight, which affected a particular crop in the 1840's and 50's in Ireland.
Social Science

This country's early railways include the spiral tunnels of the Gotthard line, and its Glacier Express railroad has a terminus at St. Moritz. This home of the vineyard terraces at Lavaux ("luh-VOE") is home to a castle where Lord Byron's poem "The Prisoner of Chillon" is set. This country hosts the yearly World Economic Forum at Davos. This country includes about eighty thousand speakers of Romansh, its fourth official language. For 10 points, name this landlocked European country home to Lake Lucerne, whose Alps include the north face of the Matterhorn.
History

In magnetohydrodynamics it determines whether or not a magnetic field will diffuse away or remain frozen in the plasma and its magnetic version is dependent on the velocity and electrical conductivity of a plasma. It is involved in a solution of the Hagen-Poiseuille equation used to approximate the Darcy friction factor and the drag coefficient must be a universal function of it. This quantity is highly dependent on the characteristic length of the region of fluid flow, and is proportional to the ratio of a fluid's inertia to its kinematic viscosity. When this value is low, it corresponds to a smooth, layered flow. For 10 points, identify this dimensionless quantity related to the turbulence of a fluid.

Science