With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: Phillip W. Magness is a historian from the Libertarian Institute for Humane Studies and Austrian School and Robert P. Murphy is an economist .
text_B: Retrieved May 29 , 2014.Historian Phillip W. Magness of the libertarian Institute for Humane Studies and Austrian School economist Robert P. Murphy challenge many of Piketty 's empirical findings and think that these may actually be the book 's greatest weakness .
SUPPORTS.