1 Many of the challenges discussed in that series represent long-standing, difficult, and complex problems that our work has shown will not be easily or quickly resolved.
The series on workplace safety discusses many challenges that are not easy to solve. 
mnli hypothesis: The series on workplace safety discusses many challenges that are not easy to solve.  premise: 1 Many of the challenges discussed in that series represent long-standing, difficult, and complex problems that our work has shown will not be easily or quickly resolved.