About: http://webisa.webdatacommons.org/416991957

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	A1 does the same thing.Then perhaps the problem is an electrical one with the signal going to the analog input pin.
http://www.w3.org/ns/prov#wasQuotedFrom	arduino.cc