Question: Getting numeric values from solution to an ODE

Hello, I am solving an ODE numerically with maple. The output is an array of the form, for example: sol(0) = [t = 0., z(t) = 0., diff(z(t), t) = 0.] Now, I can access the three sections like: sol(0)[2] = z(t) = 0. But I just want the number. How do I access just the 0, in this case?
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