Assertion: organic aniline dye | /r/HasProperty | discovered by william henry perkin
Facets:
value: serendipitously
type: MANNER
value: in 1856
type: TEMPORAL
Source sentences:
text: The first human-made organic aniline dye, mauveine, was discovered serendipitously by William Henry Perkin in 1856, the result of a failed attempt at the total synthesis of quinine.