@prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix sosa: <http://www.w3.org/ns/sosa/> .
@prefix xsd:  <http://www.w3.org/2001/XMLSchema#> .
@base <http://example.org/data/> .

# movements of spinning cups on wind sensor #14 serves as proxies for the wind speed
# at the location of the wind sensor.

<windSensor/14> rdf:type sosa:Sensor ;
  sosa:observes <location/4687#windSpeed> .

# wind sensor #14 made observations #147 and #148.

<windSensor/14> rdf:type sosa:Sensor ;
  sosa:madeObservation <observation/147> , <observation/148> .

# the result of observations #147 and #148 is using some custom datatype that encodes the unit of measure.

<observation/147> rdf:type sosa:Observation ;
  sosa:observedProperty <location/4687#windSpeed> ;
  sosa:madeBySensor <windSensor/14> ;
  sosa:resultTime "2017-04-12T12:00:00Z"^^xsd:dateTime ;
  sosa:hasSimpleResult "47 km/h"^^<speed> .

<observation/148> rdf:type sosa:Observation ;
  sosa:observedProperty <location/4687#windSpeed> ;
  sosa:madeBySensor <windSensor/14> ;
  sosa:resultTime "2017-04-12T12:01:00Z"^^xsd:dateTime ;
  sosa:hasSimpleResult "43 km/h"^^<speed> .