PMC:7796058 / 45087-45182
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T313","span":{"begin":0,"end":95},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"There are various methods for indoor positioning, such as WiFi, BLE beacons, or dead reckoning."}