Archie is organizing his research about journalists who covered the 1871 Chicago fire, and one of her sources is The Great Fire
by Jim Murphy. A circle is labeled Joseph Chamberlin. 2 circles are connected to this main circle. The first is labeled Actions. The second is labeled Thoughts/Feelings. Which detail belongs in the thoughts/feelings area of this web? “With the air now scorching hot, Chamberlin did what he should have done in the first place.” “Claire Innes, Joseph Chamberlin . . . had . . . seen mass panic, crime, and acts of violence.” “Despite the fire's approach, the heat and shower of burning debris, Chamberlin remained calm,” “Chamberlin . . . crawled up onto one of the bridge's arched railings.”
dependant clause, cause we don't know who "who" is and the first sentance tells us this. If the sentence was on it's own without the context, we'd have no idea who "who" is.