I want to know the answer to the following question:
Shell was accused of participating in the execution of which southern Nigerian tribal leader?
All the background I'm provided with is that "In particular, Shell stood accused of collaborating in the execution of Ken Saro-Wiwa and eight other leaders of the Ogoni tribe of southern Nigeria, who were hanged in 1995 by Nigeria's then military rulers.". Is that enough to answer the question?
Answer: yes