Complex sentence: When surveyed in 1971 the community had 47 children at the mission school, Grants awarded in 1973 to 1975 allowed the mission to construct toilets, ablution blocks and a dam.
Split into simpler sentences: When surveyed in 1971 the community had 47 children at the mission school. Grants were awarded in 1973 to 1975 which allowed the mission to construct toilets, ablution blocks and a dam.