Problem: Which medical instrument was invented by Rene Laennec at the Necker Hospital in Paris in 1816?
======
A: stethoscope

Problem: Who wrote the 1921 opera The Love for Three Oranges'?
======
A: prokofiev

Problem: Which European country has land borders with Austria, Hungary, Italy and Croatia?
======
A: slovenia

Problem: In Greek mythology, Heracles' First Labour was to slay which creature?
======
A:
nemean lion