text: var mongoose = require('mongoose')
    , Schema = mongoose.Schema
  
  /**
   * Question/Answer Schema
   */
  
  
  var ActivitySchema = new Schema({
    // question: { type: Schema.Types.ObjectId, ref: 'Question' },
    desc: { type: String, default: '' },
    start: { type: Date, default: Date.now },
    stop: { type: Date}
  })
  
  mongoose.model('Activity', ActivitySchema)
  
  