Creating an alert using ${option} to collect the current temperature

Here is my alert but I can't get it to pull the current temperature, The bolded alert doesn't work but everything else does

${NodeName} has sent a High Temperature Alert that exceeds the threshold of 75 degrees. Current Temperature is${temperature} , today at ${time} at ${Node.Location}

Here is the output

usat1npdu05L1 has sent a High Temperature Alert that exceeds the threshold of 75 degrees. Current Temperature is ${temperature} , today at 3:12 AM at Lifeline Data Center