Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) -- The sweet aroma of blossoming orange trees wafts through the air as a white-haired figure moves slowly along the green-choked path. Aided by a yard stick, 85-year-old Sam Motsuenyane walks through his citrus orchard in South Africa's Winterveldt area, occasionally stopping to check the lush fruits hanging from the trees. The scene strikes a sharp contrast to what the veteran agriculturalist encountered when he returned to the area in early 2000 to retire following a successful career as a South African diplomat and leading banker. Weeds and bushes had reclaimed the deserted plots as much of the land laid fallow and under-utilized due to lack of resources and the local farmers' economic hardship.A community initiative in South Africa helps poor farmers make a living by growing treesMore than two-thirds of African countries are net importers of agricultural productsExperts call African governments to invest in agriculture research and infrastructure 
 Question:Back in the Winterveldt fields, _ also calls on South African leaders to take a greater role in encouraging people to work on the land.

Sam Motsuenyane