About: http://webisa.webdatacommons.org/354555557

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Return at intervals of one week at the same time to repeat the measurement to see whether the shadow is longer or shorter.
http://www.w3.org/ns/prov#wasQuotedFrom	astronomy.org