Complex sentence: Lakenheath Fen Nature Reserve, created in 1996, restored wetlands from agricultural fields that were growing carrots; in May 2007 it was reported that cranes were nesting in the site for the first time since the fenlands were drained in trhe sixteenth century.
Split into simpler sentences: Lakenheath Fen Nature Reserve, created in 1996, restored wetlands from agricultural fields that were growing carrots. In May 2007, it was reported that cranes were nesting in the site for the first time since the fen lands were drained in the sixteenth century.