Assertion: metal's boiling point | /r/HasProperty | 1900 °c
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Source sentences:
text: Its melting (777 °C) and boiling (1377 °C) points are lower than those of calcium (842 °C and 1484 °C respectively); barium continues this downward trend in the melting point (727 °C), but not in the boiling point (1900 °C).