Assertion: iron | /r/HasProperty | key ingredient
Facets:
value: in primary productivity
type: LOCATION
value: in steel
type: LOCATION
Source sentences:
text: Iron, one of the most abundant elements on Earth, helped give rise to entire civilizations and is the key ingredient in steel, without which many of our modern structures would not be standing.
text: Iron is a key micronutrient in primary productivity, and a limiting nutrient in the Southern ocean, eastern equatorial Pacific, and the subarctic Pacific referred to as High-Nutrient, Low-Chlorophyll (HNLC) regions of the ocean.
text: Iron is a key part of hemoglobin, a protein your red blood cells use to carry oxygen from your lungs to the rest of your body.
text: Iron is a vital constituent of plant and animal life, and is the key component of haemoglobin.