diff --git a/ch12_mining.adoc b/ch12_mining.adoc
index d47ff1a3..15f9ebf4 100644
--- a/ch12_mining.adoc
+++ b/ch12_mining.adoc
@@ -1085,11 +1085,11 @@ a block at the same height and immediately start computing the next
 block in the chain, using Jing's block as the "parent." By building on
 top of Jing's newly discovered block, the other miners are essentially
 using their mining power to endorse Jing's block and the
-chain it extends.
+chain((("candidate blocks", "mining", startref="candidate-mine")))((("blocks", "candidate blocks", "mining", startref="block-candidate-mine")))((("mining", "candidate blocks", startref="mining-candidate")))((("bitcoins", "mining", "candidate blocks", startref="bitcoin-mining-candidate"))) it extends.
 
 In the next section, we'll look at the process each node uses to
 validate a block and select the most-work chain, creating the consensus
-that forms the decentralized ((("candidate blocks", "mining", startref="candidate-mine")))((("blocks", "candidate blocks", "mining", startref="block-candidate-mine")))((("mining", "candidate blocks", startref="mining-candidate")))((("bitcoins", "mining", "candidate blocks", startref="bitcoin-mining-candidate")))blockchain.
+that forms the decentralized blockchain.
 
 === Validating a New Block