LookupViewService quit unexpectedly

Hello!
I have an issue with a program called "LookupViewService" (I have no idea what it is really!). Every 30 minutes or so, the program crashes and I get a problem report saying "LookupViewService quit unexpectedly" (or any similar phrasing, I am translating here). Here are the details of the problem:

Process: LookupViewService [625]

Path: /System/Library/Frameworks/Foundation.framework/Versions/C/XPCServices/LookupVi ewService.xpc/Contents/MacOS/LookupViewService

Identifier: com.apple.LookupViewService

Version: 1.0 (160)

Build Info: Lookup_executables-160000000000000~48

Code Type: X86-64 (Native)

Parent Process: ??? [1]

Responsible: Preview [534]

User ID: 501

Date/Time: 2015-08-04 11:18:50.358 +0200

OS Version: Mac OS X 10.10.4 (14E46)

Report Version: 11

I don't see any direct effect of the program crashing, but it is really annoying (a report message popping up every half hour! Ugh!). I don't even know what LookupViewService is, so I don't feel confident simply finding it and deleting it. Does anyone know how to solve the problem? Thank you! 😀