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This work aims at determining the composition of certain $N^*$ and $\Delta$resonances, i.e. whether they are compact states formed directly by quarks andgluons, or hadronic molecules generated from the meson-baryon interaction. Theinformation of the resonance poles is provided by a comprehensivecoupled-channel approach, the J\"{u}lich-Bonn model. $13$ states that aresignificant in this approach are studied. Two criteria for each state areadopted in this paper, the comparison thereof roughly indicates the modeluncertainties. It is found that the conclusions for $8$ resonances arerelatively certain: $N(1535) \frac{1}{2}^-$, $N(1440) \frac{1}{2}^+$, $N(1710)\frac{1}{2}^+$, and $N(1520) \frac{3}{2}^-$ tend to be composite; whereas$N(1650) \frac{1}{2}^-$, $N(1900) \frac{3}{2}^+$, $N(1680) \frac{5}{2}^+$, and$\Delta(1600) \frac{3}{2}^+$ tend to be compact.

Nature of the $N^*$ and $\Delta$ resonances via coupled-channel dynamics