It is also an occasion to salute the many people who give their time and skills to promote the personal growth and development of our children and young adults, and it is a time to remember the founders of the international scouting and guiding movement, Lord and Lady Baden-Powell, who started scouting in 1907 and guiding in 1909.
Can we infer the following?
He started scouting in 1907

OPT:
[1]. Yes;
[2]. It's impossible to say;
[3]. No;
The answer is:
[1].