Complex sentence: A specimen planted in 1978 at the Sir Harold Hillier Gardens in England had attained a height of 8 m by 2002; sited close to other trees, an appreciation of its form is not possible.
Split into simpler sentences: A specimen planted in 1978 at the Sir Harold Hillier Gardens in England had attained a height of 8 m by 2002. Planted close to other trees, an appreciation of its form is not possible.