I'm having problems getting a value I need using a Terser. Here's the PID
segment of a test message:

PID|1||0123456^^^H^HOSP~4567891252^^^NH^NHS||TEST SYSTEMS^TEST
PATIENT^^^||19400101|F|||Hinde House^Bethel Street^Norwich^Great Yarmouth
and Gorleston, Norfolk^NR2 1NR||01603 016030|||2||||||||||||||N

I want to retrieve the value of the second subcomponent of field 3,
component 5 (4567891252 in the example). The following correctly gives me
'HOSP', the first subcomponent:

terser.get("/.PID-3-5-1")

But terser.get("/.PID-3-5-2"), which should return '4567891252', returns
null. Have I misunderstood something? This is with HAPI 0.5.1.
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