question: What element joins potassium , calcium , manganese , iron , and sodium to make a combined 1 % of the chemical composition of wood ?
answer: magnesium
turker_answer: Magnesium joins potassium , calcium , manganese , iron , and sodium to make a combined 1 % of the chemical composition of wood .
rule-based: Magnesium joins potassium , calcium , manganese , iron , and sodium to make a combined 1 % of the chemical composition of wood .