Complex sentence: J.C. Cunningham had used the front point technique while working in Antarctica ice bergs and cliffs on slope of 70 to 90 degrees.Adopting this technique is stated to be tough on the mountaineers but its margin of error is very small.
Split into simpler sentences: J.C. Cunningham had used the front point technique while working in Antarctica ice bergs and cliffs on slope of 70 to 90 degrees. Use of this technique is stated to be tough on the mountaineers but its margin of error is very small.