Task: Text Categorization
Input (English): It was co-discovered by its namesake and Robert Ochsenfeld in 1933. When tin crystlals were cooled below 3.72 Kelvin, the earth's magnetic field was expelled. A partial effect can be seen in some materials like vanadium and niobium, called type II superconductors, while an external magnetic field can be made so strong that the effect does not occur. FTP, name this effect, the falling off of the magnetic flux within a superconductor when it is cooled below a critical temperature in a magnetic field.
Output (English): Science