Matches in DBpedia 2015-10 for { ?s ?p "Research Cave is a Native American archeological site near Portland, Missouri. Locally known as "Arnold-Research Cave" or "Saltpetre Cave", the cave is located in an outcrop of sandstone approximately 2 miles (3.2 km) north of Portland. it was occupied intermittently for over 8,000 years. It has been recommended for de-designation as a National Historic Landmark due to looting."@en }
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- Research_Cave abstract "Research Cave is a Native American archeological site near Portland, Missouri. Locally known as "Arnold-Research Cave" or "Saltpetre Cave", the cave is located in an outcrop of sandstone approximately 2 miles (3.2 km) north of Portland. it was occupied intermittently for over 8,000 years. It has been recommended for de-designation as a National Historic Landmark due to looting.".
- Research_Cave comment "Research Cave is a Native American archeological site near Portland, Missouri. Locally known as "Arnold-Research Cave" or "Saltpetre Cave", the cave is located in an outcrop of sandstone approximately 2 miles (3.2 km) north of Portland. it was occupied intermittently for over 8,000 years. It has been recommended for de-designation as a National Historic Landmark due to looting.".