'Divide a list into two using R

I've created an r list which comprises of the Class and Results information. How do I divide this list into two, r0 and r1, depending on the Class value?

> print(r)
   Class       Results
1      1 JHU_113_2.CEL
2      0   JHU_144.CEL
3      1   JHU_173.CEL
4      1  JHU_176R.CEL
5      1   JHU_182.CEL
6      0   JHU_186.CEL
7      1   JHU_187.CEL
8      1   JHU_188.CEL
9      1   JHU_203.CEL
10     0   JHU_205.CEL
11     1   JHU_207.CEL
12     0   JHU_210.CEL
13     0 JHU_211R3.CEL
14     0   JHU_214.CEL
15     0   JHU_215.CEL
16     1   JHU_220.CEL
17     1   JHU_221.CEL
18     0   JHU_222.CEL
19     0   JHU_229.CEL
20     0   JHU_231.CEL
21     0    JHU_80.CEL
22     0    JHU_88.CEL
23     0    JHU_95.CEL
24     0   JHU_016.CEL
25     0   JHU_046.CEL
26     1   JHU_096.CEL
r


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