Group data during import of .dat file.

I have this data which is given below (and a .dat file is also attaced: actual data is very large this is only a scaled-down version to give an idea).

Thsis data has three groups.

each group have ID, date, time and, location.

I want to import data into matlab, and I wannt to put data into a structures based on ID. I also need to extarct ID date and time from this file.

Currently I can import data, my imported data is in three coulmns but I cant figure out how to separate three groups.

First Data Group

ID: 1122

Date: 05-10-2019

Time: 17:30

Location: New York

----Readings----

First column: time (s)

Second column: Distance Travelled (m)

Third column: Position. (m)

0.0000 5.1825 -0.9648

0.100 5.1181 -0.9092

0.200 5.0538 -0.8548

0.300 4.9896 -0.8014

0.400 4.9256 -0.7492

0.500 4.8617 -0.6980

0.600 4.7980 -0.6479

0.700 4.7344 -0.5989

0.800 4.6709 -0.5510

0.900 4.6076 -0.5042

1.000 4.5444 -0.4584

Second Data Group

ID: 1123

Date: 05-10-2019

Time: 17:35

Location: New York

----Readings----

First column: time (s)

Second column: Distance Travelled (m)

Third column: Position. (m)

0.0000 5.1825 -0.9648

0.100 5.1181 -0.9092

0.200 5.0538 -0.8548

0.300 4.9896 -0.8014

0.400 4.9256 -0.7492

0.500 4.8617 -0.6980

0.600 4.7980 -0.6479

0.700 4.7344 -0.5989

0.800 4.6709 -0.5510

0.900 4.6076 -0.5042