Walker v. Armco Steel Corp.
{'<entity_0>': 'Supreme Court of the United States', '<entity_1>': 'Walker v. Armco Steel Corp.', '<entity_2>': 'decision'}
[['Walker v. Armco Steel Corp.', 'court', 'Supreme Court of the United States'], ['Walker v. Armco Steel Corp.', 'significant event', 'decision']]
<entity_1>, 446 U.S. 740 (1980), was a <entity_2> by the <entity_0> in which the Court further refined the test for determining whether federal courts sitting in diversity must apply state law as opposed to federal law.
['legal case', 'United States Supreme Court decision']