Text: Christopher Dunn related that his research interventions took 30 to 40 minutes, but his interventions outside the research arena took about 20 minutes because the process did not have to be so complicated and uniform, and there was less data collection.
Entailment: Christopher Dunn reported that his research interventions took anywhere from 30 to 40 minutes.
Contradiction: Christopher estimated that his research interventions took between two and three hours.