Assertion: phosphate's element | /r/ObjectUse | used in battery
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Source sentences:
text: Rare earth elements (REEs) are a group of 17 elements used in various products such as alloys, batteries, and catalysts, with over 60% used as catalysts.5,6 Substitute for REEs are available but are less effective.5 China controlled more than 71% of REE production in 2018.5