Assertion: pitcher's era | /r/HasProperty | calculated
Facets:
value: by adding up the earned runs
type: MANNER
Source sentences:
text: ERA for the season is calculated by putting the amount of earned runs a pitcher has allowed over the amount of innings he has pitched, and then cross multiplying that by x/9.
text: An ERA is calculated by adding up the earned runs and dividing the number by the number of innings pitched.