---
&a1
!!str
scalar1
---
!!str
&a2
scalar2
---
&a3
!!str scalar3
---
&a4 !!map
&a5 !!str key5: value4
---
a6: 1
&anchor6 b6: 2
---
!!map
&a8 !!str key8: value7
---
!!map
!!str &a10 key10: value9
---
!!str &a11
value11