Anchor: The number of studies that have demonstrated effects either with volunteer or randomized participants is modest but increasing, and the effects range from minimal to very sizeable reduction in risks that have significant public health importance.
Entailed: Studies have shown a modest and increasing level of effect that could be significant for public health.
Contradiction: There haven't been any studies on this topic and there don't seem to be any public health implications.
Contradiction: The man walking underneath the bridge turns away from the camera.
Contradiction: It was kind of annoying. Of course the woman would fall out if they opened the door and she didn't have her seat belt on. 
Contradiction: The dog lazily walks through the park.
Contradiction: At least one man is jet skiing.