Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Context: Bazex syndrome, or acrokeratosis paraneoplastica, is a cutaneous paraneoplastic syndrome characterized by psoriasiform lesions associated with, usually, a squamous cell carcinoma of the upper aerodigestive tract. We present a case of Bazex syndrome associated with metastatic cervical squamous cell carcinoma with an unknown primary. The features of the condition are discussed in the light of current knowledge.
Question: Name synonym of Acrokeratosis paraneoplastica.
bazex syndrome

Context: Restless leg syndrome (RLS) is a sensorimotor disorder. Clinical studies have implicated the dopaminergic system in RLS, while others have suggested that it is associated with insufficient levels of brain iron. To date, alterations in brain iron status have been demonstrated but, despite suggestions from the clinical literature, there have been no consistent findings documenting a dopaminergic abnormality in RLS brain tissue. In this study, the substantia nigra and putamen were obtained at autopsy from individuals with primary RLS and a neurologically normal control group. A quantitative profile of the dopaminergic system was obtained. Additional assays were performed on a catecholaminergic cell line and animal models of iron deficiency. RLS tissue, compared with controls, showed a significant decrease in D2R in the putamen that correlated with severity of the RLS. RLS also showed significant increases in tyrosine hydroxylase (TH) in the substantia nigra, compared with the controls, but not in the putamen. Both TH and phosphorylated (active) TH were significantly increased in both the substantia nigra and putamen. There were no significant differences in either the putamen or nigra for dopamine receptor 1, dopamine transporters or for VMAT. Significant increases in TH and phosphorylated TH were also seen in both the animal and cell models of iron insufficiency similar to that from the RLS autopsy data. For the first time, a clear indication of dopamine pathology in RLS is revealed in this autopsy study. The results suggest cellular regulation of dopamine production that closely matches the data from cellular and animal iron insufficiency models. The results are consistent with the hypothesis that a primary iron insufficiency produces a dopaminergic abnormality characterized as an overly activated dopaminergic system as part of the RLS pathology.
Question: Which deficiency is the cause of restless leg syndrome?
iron

Context: The Redskins primary weapon in the backfield was running back Earnest Byner, who ranked 5th in the NFL with 1,048 rushing yards, while also catching 34 passes for 308 yards and scoring 5 touchdowns. Rookie running back Ricky Ervins was also a major asset to the running attack, rushing 145 times for 680 yards for an average of 4.7 yards per carry, while also catching 16 passes for 181 yards. And when Washington was near the goal line, they usually relied on fullback Gerald Riggs, who rushed for 248 yards and scored 11 touchdowns. The Redskins offensive line, known as "The Hogs (American football)", was led by Pro Bowl tackle Jim Lachey and guard Mark Schlereth, along with four-time Pro Bowl veteran Russ Grimm. The Hogs allowed the fewest sacks in the league with just 9, 10 sacks less than the team that allowed the second-fewest. Even Washingtons special teams unit was a big threat. Running back Brian Mitchell (running back) led the NFL in punt return yards (600) and punt return touchdowns (2) with a 13.3 yards per return average, while also gaining 583 yards returning kickoffs.
Question: Which player had more rushing yards, Ricky Ervins or Earnest Byner?
earnest byner,