Assertion: skateboarder's board | /r/HasProperty | positioned on its side/edge
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Source sentences:
text: The rider uses the same pressure that would be applied if he/she is attempting to adopt a "primo" position (when the board is positioned on its side/edge); however, one foot is placed under the board so that the board is not completely in a "dark" position (when the board is upside down, with the griptape facing the ground).