With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Arya Stark is often mistaken for a girl.
text_B: Observations and Measurements -LRB- O&M -RRB- is an International Standard which defines a conceptual schema encoding for observations , and for features involved in sampling when making observations .. While the O&M standard was developed in the context of geographic information systems , the model is derived from generic patterns proposed by Fowler and Odell , and is not limited to spatial information .. O&M is one of the core standards in the OGC Sensor Web Enablement suite , providing the response model for Sensor Observation Service -LRB- SOS -RRB- .. OGC Sensor Web Enablement. Semantic Sensor Web#OGC Sensor Web Enablement. Sensor Observation Service. Sensor Observation Service
not_related.