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Representations of an axe and a boat at the Ri Cruin Cairn in Kilmartin , and a boat pecked into Wemyss Cave , are probably the oldest two-dimensional representations of real objects that survive in Scotland .
 Kilmartin, Wemyss Cave
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kilmartin, Wemyss Cave