How to capture comments and read in next participent steps in Workflow?

I want to capture comments in one of the participent steps of my workflow and read them in the next step . Please share some suggestions on it .
I have added a from step as the participent step but it is saving data with random ids . I am not able to figure out how to read the data for corresponding process step in the workflow ?
Please help .

had to write Java process for the same
Just in case somebody wants a java version of the answer Sham mentioned above
please feel free
HistoryItem previousHistoryItem;
String stepType;
this.workItem = item;
this.workflowSession = session;
this.history = workflowSession.getHistory(workItem.getWorkflow());
Iterator<HistoryItem> historyIterator = history.iterator();
while(historyIterator.hasNext()){
    previousHistoryItem = historyIterator.next();
    stepType = previousHistoryItem.getWorkItem().getNode().getType();
    if(stepType != null && stepType.equals(WorkflowNode.TYPE_PARTICIPANT) && previousHistoryItem.getWorkItem().getMetaDataMap().get("someproperty",String.class) != null){
        someproperty=previousHistoryItem.getWorkItem().getMetaDataMap().get("someproperty",String .class);
        log("\n someproperty : " + "\n" + someproperty);
    }else{
        log("\nNo Step type or someproperty Found...");

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