Possible to have multiple series on a time chart?

Likely a rookie error, but is it possible to have multiple lines on a line chart?

Sample app [here](http://s3-ap-southeast-2.amazonaws.com/languagesofaustralia.com/SimonJacksonFiles/cedar_hub8.html)

The request seems to be returning the[ expected results](https://services1.arcgis.com/vHnIGBHHqDR6y0CR/ArcGIS/rest/services/CrashStats_2017/FeatureServer/0/query?where=1%3D1&returnGeometry=false&returnDistinctValues=false&returnIdsOnly=false&returnCountOnly=false&outFields=*&sqlFormat=standard&f=json&orderByFields=accident_date&groupByFieldsForStatistics=accident_date&outStatistics=%5B%7B%22statisticType%22%3A%22sum%22%2C%22onStatisticField%22%3A%22bicyclist%22%2C%22outStatisticFieldName%22%3A%22bicyclist_SUM%22%7D%2C%7B%22statisticType%22%3A%22sum%22%2C%22onStatisticField%22%3A%22pedestrian%22%2C%22outStatisticFieldName%22%3A%22pedestrian_SUM%22%7D%5D) from the service, but I must be missing something in parsing the results into the chart.

```
var chart = new Cedar({"type":"time"});

var datasets = [
{
"url": "https://services1.arcgis.com/vHnIGBHHqDR6y0CR/ArcGIS/rest/services/CrashStats_2017/FeatureServer/0",
"query": {
"orderByFields": "accident_date",
"groupByFieldsForStatistics": "accident_date",
"outStatistics": [
{
"statisticType": "sum",
"onStatisticField": "bicyclist",
"outStatisticFieldName": "bicyclist_SUM"
},
{
"statisticType": "sum",
"onStatisticField": "pedestrian",
"outStatisticFieldName": "pedestrian_SUM"
}
]
}
}
];

var series = [
{
"category": { "field": "accident_date", "label": "Date" },
"value": { "field":"bicyclist_SUM","label":"Bikes" }
},
{
"category": { "field": "accident_date", "label": "Date" },
"value": { "field":"pedestrian_SUM","label":"Peds" }
}

];

chart.datasets = datasets;
chart.series = series;
chart.show({
elementId: "#chart",
autolabels: true
});
```

Start with the linked sample app and the Cedar time-chart handling of the datasets and series configuration. Inspect how the ArcGIS response fields bicyclist_SUM and pedestrian_SUM are parsed, then verify the chart renders both labeled lines from the provided configuration. Done means the sample displays separate bicyclist and pedestrian series.

Written by the indexing model from the issue text.