Remove unnecessary quotation marks

Image_Segmentation.ipynb

@@ -656,7 +656,7 @@
    "id": "d651c950-cac8-40d0-9de0-d808a820608c",
    "metadata": {},
    "source": [
-    "The NWP data that we will be using as input to our network is stored in NetCDF format, as is common for weather and climate datasets. fastai does not understand this file format natively, so we therefore need to define a function `open_xarray` to read in the data. The function uses the `xarray` library to open a NetCDF file and returns a NumPy array of the vertical velocities."
+    "The NWP data that we will be using as input to our network is stored in NetCDF format, as is common for weather and climate datasets. fastai does not understand this file format natively, so we therefore need to define a function `open_xarray` to read in the data. The function uses the xarray library to open a NetCDF file and returns a NumPy array of the vertical velocities."
    ]
   },
   {
@@ -1267,7 +1267,7 @@
    "id": "9f2aead5-1307-4621-be9a-0ebe86a16fd2",
    "metadata": {},
    "source": [
-    "Making predictions from the trained models is slightly tricky. Due to fastai peculiarities, the vertical velocity input data need to be supplied in slightly different formats to the various models. We are storing the prediction output in `DataArray` objects using the `xarray` library, and we are returning these together in a `DataSet`. Adding the coordinates as metadata will make plotting easier later on."
+    "Making predictions from the trained models is slightly tricky. Due to fastai peculiarities, the vertical velocity input data need to be supplied in slightly different formats to the various models. We are storing the prediction output in `DataArray` objects using the xarray library, and we are returning these together in a `DataSet`. Adding the coordinates as metadata will make plotting easier later on."
    ]
   },
   {