> access-list 5 remark No BGP Peer Fail-Over via OSPF
This is a comment inserted in the access list to make its purpose clear.
> address-family ipv4 vrf ABC
Specifies the IPv4 address family and enters address family configuration mode.
?The vrf keyword and vrf-name argument "ABC" specify the name of the VRF instance to associate with subsequent IPv4 address family configuration mode commands.
Check this BGP configuration guide:
http://www.cisco.com/en/US/products/ps6441/products_configuration_guide_chapter09186a008054e098.html
