
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
In the diagram, $RSP$ is a straight line, and $\angle QSP = 70^\circ$. $RS \neq SQ$ and $PS \neq SQ$, and $\angle PSQ = 60^\circ$. What is the measure of $\angle PQR$, in degrees?

[asy]
draw((.48,-.05)--(.48,.05)); draw((.52,-.05)--(.52,.05)); draw((1.48,-.05)--(1.48,.05)); draw((1.52,-.05)--(1.52,.05));

draw((1.04,.51)--(1.14,.49)); draw((1.03,.47)--(1.13,.45));
draw((0,0)--(2,0)--(1.17,.98)--cycle);
label("$P$",(2,0),SE); label("$R$",(0,0),SW); label("$Q$",(1.17,.98),N);

label("$70^\circ$",(1,0),NE);
label("$60^\circ$",(1.5,0.5),NE);

label("$S$",(1,0),S);
draw((1,0)--(1.17,.98));
[/asy]

Present the answer in LaTex format: \boxed{Your answer}
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