11.   The community typically occurs on peaty soils on gentle slopes or plateaus at higher altitudes.

12.   The court will have to Decide exactly what occurred on the night Mellor died.

13.   The first major communication problem occurred on the morning of departure.

14.   The same problem has occurred before on numerous occasions.

15.   The sides and are the II-IV and III-IV boundaries respectively, and the focusing singularity occurs on the line.

16.   Their construction and use indicates permanent pasture, thus they presumably represent abandoned areas when occurring on village and field sites.

17.   This phenomenon occurs on a broader level as well, although the dynamics are somewhat different.

18.   This political sea change coincided with the most dramatic incident to have occurred on the Hinkley Point site since it started operation.

19.   These snails do not occur on low-lying coral islands or atolls.

20.   The crash occurred on a sharp bend.