Original sentence: " A 20/20 investigation aired on June 1, 2007 found Mannatech's salespeople being taught how to target Mannatech products to patients with specific illnesses while avoiding outright illegal conduct by avoiding direct claims that the product would cure any particular disease
Edited sentence: " A 20/20 investigation aired on June 1, 2007 has revealed the questionable practices of the company.It aired videos of Mannatech's salespeople being taught how to target patients with specific illnesses while avoiding outright illegal conduct by avoiding direct claims that the product would cure any particular disease